Neville Harnew: Publications

Study of the rare B⁰s and B⁰ decays into the π⁺π^-μ⁺μ^- final state

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 743:1 (2015) 46-55

Authors:

Abstract:

© 2015 The Authors. A search for the rare decays B⁰s → π⁺π^-μ⁺μ^- and B⁰ → π⁺π^-μ⁺μ^- is performed in a data set corresponding to an integrated luminosity of 3.0fb^-1collected by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7 and 8TeV. Decay candidates with pion pairs that have invariant mass in the range 0.5-1.3GeV/c² and with muon pairs that do not originate from a resonance are considered. The first observation of the decay B⁰s → π⁺π^-μ⁺μ^-and the first evidence of the decay B⁰ → π⁺π^-μ⁺μ^-are obtained and the branching fractions, restricted to the dipion-mass range considered, are measured to be B(B⁰s → π⁺pπμ⁺μ^-) =(8.6 ±1.5(stat) ±0.7(syst) ±0.7 (norm)) ×10^-8 and B(B⁰ → π⁺π^-μ⁺μ^-) =(2.11±0.51(stat)±0.15(syst)±0.16(norm)) × 10^-8, where the third uncertainty is due to the branching fraction of the decay B⁰ → J/ψ(→ μ⁺μ^-)K*(892)⁰(→ K⁺p^-), used as a normalisation.

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Study of η − η^′ mixing from measurement of B (s)⁰ → J/ψη^(′) decay rates

Journal of High Energy Physics 2015:1 (2015) 1-24

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LHCb collaboration The, R Aaij, B Adeva, M Adinolfi, A Affolder, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, L Anderlini, J Anderson, R Andreassen, M Andreotti, M Andreotti, JE Andrews, RB Appleby, O Aquines Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, C Baesso, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, AB Bertolin, MO Bettler, M van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, A Bizzeti, PM Bjørnstad, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, A Bondar, N Bondar, N Bondar, W Bonivento, S Borghi, A Borgia, M Borsato, TJV Bowcock, E Bowen, C Bozzi, D Brett, M Britsch, T Britton, J Brodzicka, NH Brook, H Brown, A Bursche, J Buytaert, S Cadeddu, R Calabrese, R Calabrese, M Calvi, M Calvi, M Calvo Gomez, M Calvo Gomez, P Campana

Abstract:

© 2015, The Author(s). Abstract: A study of B and B^s meson decays into J/ψ η and J/ψ η^′ final states is performed using a data set of proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, collected by the LCHb experiment and corresponding to 3.0 fb⁻¹ of integrated luminosity. The decay B⁰ → J/ψ η^′ is observed for the first time. The following ratios of branching fractions are measured: (Formula Presented) where the third uncertainty is related to the present knowledge of fs/fd, the ratio between the probabilities for a b quark to form a B^s or a B⁰ meson. The branching fraction ratios are used to determine the parameters of η − η^′ meson mixing. In addition, the first evidence for the decay B^s → ψ(2S)η^′ is reported, and the relative branching fraction is measured, (Formula Presented) where the third uncertainty is due to the limited knowledge of the branching fractions of J/ψ and ψ(2S) mesons.

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Measurement of the Z+b-jet cross-section in pp collisions at s = 7 TeV in the forward region

Journal of High Energy Physics Springer Nature 2015:1 (2015) 64

Authors:

The LHCb collaboration, R Aaij, B Adeva, M Adinolfi, A Affolder, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, J Anderson, R Andreassen, M Andreotti, JE Andrews, RB Appleby, O Aquines Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, C Baesso, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, AB Bertolin, M-O Bettler, M van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, PM Bjørnstad, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, A Bondar, N Bondar, W Bonivento, S Borghi, A Borgia, M Borsato, TJV Bowcock, E Bowen, C Bozzi, D Brett, M Britsch, T Britton, J Brodzicka, NH Brook, A Bursche, J Buytaert, S Cadeddu, R Calabrese, M Calvi, M Calvo Gomez, P Campana, D Campora Perez, L Capriotti, A Carbone, G Carboni, R Cardinale, A Cardini, L Carson, K Carvalho Akiba, RCM Casanova Mohr, G Casse, L Cassina, L Castillo Garcia, M Cattaneo, Ch Cauet, R Cenci, M Charles, Ph Charpentier, M Chefdeville, S Chen, S-F Cheung, N Chiapolini, M Chrzaszcz, X Cid Vidal, G Ciezarek, PEL Clarke, M Clemencic, HV Cliff, J Closier, V Coco, J Cogan, E Cogneras, V Cogoni, L Cojocariu, G Collazuol, P Collins, A Comerma-Montells, A Contu, A Cook, M Coombes, S Coquereau, G Corti, M Corvo, I Counts, B Couturier, GA Cowan, DC Craik, AC Crocombe, M Cruz Torres, S Cunliffe, R Currie, C D’Ambrosio, J Dalseno, P David, PNY David, A Davis, K De Bruyn, S De Capua, M De Cian, JM De Miranda, L De Paula, W De Silva, P De Simone, C-T Dean, D Decamp, M Deckenhoff, L Del Buono, N Déléage, D Derkach, O Deschamps, F Dettori, B Dey, A Di Canto, A Di Domenico, H Dijkstra, S Donleavy, F Dordei, M Dorigo, A Dosil Suárez, D Dossett, A Dovbnya, K Dreimanis, G Dujany, F Dupertuis, P Durante, R Dzhelyadin, A Dziurda, A Dzyuba, S Easo, U Egede, V Egorychev, S Eidelman, S Eisenhardt, U Eitschberger, R Ekelhof, L Eklund, I El Rifai, Ch Elsasser, S Ely, S Esen, H-M Evans, T Evans, A Falabella, C Färber, C Farinelli, N Farley, S Farry, R Fay, D Ferguson, V Fernandez Albor, F Ferreira Rodrigues, M Ferro-Luzzi, S Filippov, M Fiore, M Fiorini, M Firlej, C Fitzpatrick, T Fiutowski, P Fol, M Fontana, F Fontanelli, R Forty, O Francisco, M Frank, C Frei, M Frosini, J Fu, E Furfaro, A Gallas Torreira, D Galli, S Gallorini, S Gambetta, M Gandelman, P Gandini, Y Gao, J García Pardiñas, J Garofoli, J Garra Tico, L Garrido, D Gascon, C Gaspar, U Gastaldi, R Gauld, L Gavardi, G Gazzoni, A Geraci, E Gersabeck, M Gersabeck, T Gershon, Ph Ghez, A Gianelle, S Gianì, V Gibson, L Giubega, VV Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, C Gotti, M Grabalosa Gándara, R Graciani Diaz, LA Granado Cardoso, E Graugés, E Graverini, G Graziani, A Grecu, E Greening, S Gregson, P Griffith, L Grillo, O Grünberg, B Gui, E Gushchin, Yu Guz, T Gys, C Hadjivasiliou, G Haefeli, C Haen, SC Haines, S Hall, B Hamilton, T Hampson, X Han, S Hansmann-Menzemer, N Harnew, ST Harnew, J Harrison, J He, T Head, V Heijne, K Hennessy, P Henrard, L Henry, JA Hernando Morata, E van Herwijnen, M Heß, A Hicheur, D Hill, M Hoballah, C Hombach, W Hulsbergen, N Hussain, D Hutchcroft, D Hynds, M Idzik, P Ilten, R Jacobsson, A Jaeger, J Jalocha, E Jans, A Jawahery, F Jing, M John, D Johnson, CR Jones, C Joram, B Jost, N Jurik, S Kandybei, W Kanso, M Karacson, TM Karbach, S Karodia, M Kelsey, IR Kenyon, T Ketel, B Khanji, C Khurewathanakul, S Klaver, K Klimaszewski, O Kochebina, M Kolpin, I Komarov, RF Koopman, P Koppenburg, M Korolev, L Kravchuk, K Kreplin, M Kreps, G Krocker, P Krokovny, F Kruse, W Kucewicz, M Kucharczyk, V Kudryavtsev, K Kurek, T Kvaratskheliya, VN La Thi, D Lacarrere, G Lafferty, A Lai, D Lambert, RW Lambert, G Lanfranchi, C Langenbruch, B Langhans, T Latham, C Lazzeroni, R Le Gac, J van Leerdam, J-P Lees, R Lefèvre, A Leflat, J Lefrançois, O Leroy, T Lesiak, B Leverington, Y Li, T Likhomanenko, M Liles, R Lindner, C Linn, F Lionetto, B Liu, S Lohn, I Longstaff, JH Lopes, P Lowdon, D Lucchesi, H Luo, A Lupato, E Luppi, O Lupton, F Machefert, IV Machikhiliyan, F Maciuc, O Maev, S Malde, A Malinin, G Manca, G Mancinelli, A Mapelli, J Maratas, JF Marchand, U Marconi, C Marin Benito, P Marino, R Märki, J Marks, G Martellotti, M Martinelli, D Martinez Santos, F Martinez Vidal, D Martins Tostes, A Massafferri, R Matev, Z Mathe, C Matteuzzi, A Mazurov, M McCann, J McCarthy, A McNab, R McNulty, B McSkelly, B Meadows, F Meier, M Meissner, M Merk, DA Milanes, M-N Minard, N Moggi, J Molina Rodriguez, S Monteil, M Morandin, P Morawski, A Mordà, MJ Morello, J Moron, A-B Morris, R Mountain, F Muheim, K Müller, M Mussini, B Muster, P Naik, T Nakada, R Nandakumar, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, M Neuner, AD Nguyen, TD Nguyen, C Nguyen-Mau, M Nicol, V Niess, R Niet, N Nikitin, T Nikodem, A Novoselov, DP O’Hanlon, A Oblakowska-Mucha, V Obraztsov, S Ogilvy, O Okhrimenko, R Oldeman, CJG Onderwater, M Orlandea, B Osorio Rodrigues, JM Otalora Goicochea, A Otto, P Owen, A Oyanguren, BK Pal, A Palano, F Palombo, M Palutan, J Panman, A Papanestis, M Pappagallo, LL Pappalardo, C Parkes, CJ Parkinson, G Passaleva, GD Patel, M Patel, C Patrignani, A Pearce, A Pellegrino, G Penso, M Pepe Altarelli, S Perazzini, P Perret, L Pescatore, E Pesen, K Petridis, A Petrolini, E Picatoste Olloqui, B Pietrzyk, T Pilař, D Pinci, A Pistone, S Playfer, M Plo Casasus, F Polci, A Poluektov, I Polyakov, E Polycarpo, A Popov, D Popov, B Popovici, C Potterat, E Price, JD Price, J Prisciandaro, A Pritchard, C Prouve, V Pugatch, A Puig Navarro, G Punzi, W Qian, B Rachwal, JH Rademacker, B Rakotomiaramanana, M Rama, MS Rangel, I Raniuk, N Rauschmayr, G Raven, F Redi, S Reichert, MM Reid, AC dos Reis, S Ricciardi, S Richards, M Rihl, K Rinnert, V Rives Molina, P Robbe, AB Rodrigues, E Rodrigues, P Rodriguez Perez, S Roiser, V Romanovsky, A Romero Vidal, M Rotondo, J Rouvinet, T Ruf, H Ruiz, P Ruiz Valls, JJ Saborido Silva, N Sagidova, P Sail, B Saitta, V Salustino Guimaraes, C Sanchez Mayordomo, B Sanmartin Sedes, R Santacesaria, C Santamarina Rios, E Santovetti, A Sarti, C Satriano, A Satta, DM Saunders, D Savrina, M Schiller, H Schindler, M Schlupp, M Schmelling, B Schmidt, O Schneider, A Schopper, M-H Schune, R Schwemmer, B Sciascia, A Sciubba, A Semennikov, I Sepp, N Serra, J Serrano, L Sestini, P Seyfert, M Shapkin, I Shapoval, Y Shcheglov, T Shears, L Shekhtman, V Shevchenko, A Shires, R Silva Coutinho, G Simi, M Sirendi, N Skidmore, I Skillicorn, T Skwarnicki, NA Smith, E Smith, E Smith, J Smith, M Smith, H Snoek, MD Sokoloff, FJP Soler, F Soomro, D Souza, B Souza De Paula, B Spaan, P Spradlin, S Sridharan, F Stagni, M Stahl, S Stahl, O Steinkamp, O Stenyakin, F Sterpka, S Stevenson, S Stoica, S Stone, B Storaci, S Stracka, M Straticiuc, U Straumann, R Stroili, L Sun, W Sutcliffe, K Swientek, S Swientek, V Syropoulos, M Szczekowski, P Szczypka, T Szumlak, S T’Jampens, M Teklishyn, G Tellarini, F Teubert, C Thomas, E Thomas, J van Tilburg, V Tisserand, M Tobin, J Todd, S Tolk, L Tomassetti, D Tonelli, S Topp-Joergensen, N Torr, E Tournefier, S Tourneur, MT Tran, M Tresch, A Trisovic, A Tsaregorodtsev, P Tsopelas, N Tuning, M Ubeda Garcia, A Ukleja, A Ustyuzhanin, U Uwer, C Vacca, V Vagnoni, G Valenti, A Vallier, R Vazquez Gomez, P Vazquez Regueiro, C Vázquez Sierra, S Vecchi, JJ Velthuis, M Veltri, G Veneziano, M Vesterinen, JVVB Viana Barbosa, B Viaud, D Vieira, M Vieites Diaz, X Vilasis-Cardona, A Vollhardt, D Volyanskyy, D Voong, A Vorobyev, V Vorobyev, C Voß, JA de Vries, R Waldi, C Wallace, R Wallace, J Walsh, S Wandernoth, J Wang, DR Ward, NK Watson, D Websdale, M Whitehead, D Wiedner, G Wilkinson, M Wilkinson, MP Williams, M Williams, HW Wilschut, FF Wilson, J Wimberley, J Wishahi, W Wislicki, M Witek, G Wormser, SA Wotton, S Wright, K Wyllie, Y Xie, Z Xing, Z Xu, Z Yang, X Yuan, O Yushchenko, M Zangoli, M Zavertyaev, L Zhang, WC Zhang, Y Zhang, A Zhelezov, A Zhokhov, L Zhong

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Measurement of the [Formula: see text] production cross-section in proton-proton collisions via the decay [Formula: see text].

The European physical journal. C, Particles and fields 75:7 (2015) 311

Authors:

R Aaij, C Abellán Beteta, B Adeva, M Adinolfi, A Affolder, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, J Anderson, R Andreassen, M Andreotti, JE Andrews, RB Appleby, O Aquines Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, C Baesso, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, M-O Bettler, M van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, PM Bjørnstad, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, A Bondar, N Bondar, W Bonivento, S Borghi, A Borgia, M Borsato, TJV Bowcock, E Bowen, C Bozzi, T Brambach, J Bressieux, D Brett, M Britsch, T Britton, J Brodzicka, NH Brook, H Brown, A Bursche, G Busetto, J Buytaert, S Cadeddu, R Calabrese, M Calvi, M Calvo Gomez, P Campana, D Campora Perez, A Carbone, G Carboni, R Cardinale, A Cardini, L Carson, K Carvalho Akiba, G Casse, L Cassina, L Castillo Garcia, M Cattaneo, Ch Cauet, R Cenci, M Charles, Ph Charpentier, M Chefdeville, S Chen, S-F Cheung, N Chiapolini, M Chrzaszcz, K Ciba, X Cid Vidal, G Ciezarek, PEL Clarke, M Clemencic, HV Cliff, J Closier, V Coco, J Cogan, E Cogneras, V Cogoni, L Cojocariu, P Collins, A Comerma-Montells, A Contu, A Cook, M Coombes, S Coquereau, G Corti, M Corvo, I Counts, B Couturier, GA Cowan, DC Craik, M Cruz Torres, S Cunliffe, R Currie, C D'Ambrosio, J Dalseno, P David, PNY David, A Davis, K De Bruyn, S De Capua, M De Cian, JM De Miranda, L De Paula, W De Silva, P De Simone, D Decamp, M Deckenhoff, L Del Buono, N Déléage, D Derkach, O Deschamps, F Dettori, A Di Canto, H Dijkstra, S Donleavy, F Dordei, M Dorigo, A Dosil Suárez, D Dossett, A Dovbnya, K Dreimanis, G Dujany, F Dupertuis, P Durante, R Dzhelyadin, A Dziurda, A Dzyuba, S Easo, U Egede, V Egorychev, S Eidelman, S Eisenhardt, U Eitschberger, R Ekelhof, L Eklund, I El Rifai, E Elena, Ch Elsasser, S Ely, S Esen, H-M Evans, T Evans, A Falabella, C Färber, C Farinelli, N Farley, S Farry, RF Fay, D Ferguson, V Fernandez Albor, F Ferreira Rodrigues, M Ferro-Luzzi, S Filippov, M Fiore, M Fiorini, M Firlej, C Fitzpatrick, T Fiutowski, P Fol, M Fontana, F Fontanelli, R Forty, O Francisco, M Frank, C Frei, M Frosini, J Fu, E Furfaro, A Gallas Torreira, D Galli, S Gallorini, S Gambetta, M Gandelman, P Gandini, Y Gao, J García Pardiñas, J Garofoli, J Garra Tico, L Garrido, C Gaspar, R Gauld, L Gavardi, G Gavrilov, A Geraci, E Gersabeck, M Gersabeck, T Gershon, Ph Ghez, A Gianelle, S Gianì, V Gibson, L Giubega, VV Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, C Gotti, M Grabalosa Gándara, R Graciani Diaz, LA Granado Cardoso, E Graugés, G Graziani, A Grecu, E Greening, S Gregson, P Griffith, L Grillo, O Grünberg, B Gui, E Gushchin, Yu Guz, T Gys, C Hadjivasiliou, G Haefeli, C Haen, SC Haines, S Hall, B Hamilton, T Hampson, X Han, S Hansmann-Menzemer, N Harnew, ST Harnew, J Harrison, J He, T Head, V Heijne, K Hennessy, P Henrard, L Henry, JA Hernando Morata, E van Herwijnen, M Heß, A Hicheur, D Hill, M Hoballah, C Hombach, W Hulsbergen, P Hunt, N Hussain, D Hutchcroft, D Hynds, M Idzik, P Ilten, R Jacobsson, A Jaeger, J Jalocha, E Jans, P Jaton, A Jawahery, F Jing, M John, D Johnson, CR Jones, C Joram, B Jost, N Jurik, M Kaballo, S Kandybei, W Kanso, M Karacson, TM Karbach, S Karodia, M Kelsey, IR Kenyon, T Ketel, B Khanji, C Khurewathanakul, S Klaver, K Klimaszewski, O Kochebina, M Kolpin, I Komarov, RF Koopman, P Koppenburg, M Korolev, A Kozlinskiy, L Kravchuk, K Kreplin, M Kreps, G Krocker, P Krokovny, F Kruse, W Kucewicz, M Kucharczyk, V Kudryavtsev, K Kurek, T Kvaratskheliya, VN La Thi, D Lacarrere, G Lafferty, A Lai, D Lambert, RW Lambert, G Lanfranchi, C Langenbruch, B Langhans, T Latham, C Lazzeroni, R Le Gac, J van Leerdam, J-P Lees, R Lefèvre, A Leflat, J Lefrançois, S Leo, O Leroy, T Lesiak, B Leverington, Y Li, T Likhomanenko, M Liles, R Lindner, C Linn, F Lionetto, B Liu, S Lohn, I Longstaff, JH Lopes, N Lopez-March, P Lowdon, D Lucchesi, H Luo, A Lupato, E Luppi, O Lupton, F Machefert, IV Machikhiliyan, F Maciuc, O Maev, S Malde, A Malinin, G Manca, G Mancinelli, A Mapelli, J Maratas, JF Marchand, U Marconi, C Marin Benito, P Marino, R Märki, J Marks, G Martellotti, A Martens, A Martín Sánchez, M Martinelli, D Martinez Santos, F Martinez Vidal, D Martins Tostes, A Massafferri, R Matev, Z Mathe, C Matteuzzi, A Mazurov, M McCann, J McCarthy, A McNab, R McNulty, B McSkelly, B Meadows, F Meier, M Meissner, M Merk, DA Milanes, M-N Minard, N Moggi, J Molina Rodriguez, S Monteil, M Morandin, P Morawski, A Mordà, MJ Morello, J Moron, A-B Morris, R Mountain, F Muheim, K Müller, M Mussini, B Muster, P Naik, T Nakada, R Nandakumar, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, M Neuner, AD Nguyen, TD Nguyen, C Nguyen-Mau, M Nicol, V Niess, R Niet, N Nikitin, T Nikodem, A Novoselov, DP O'Hanlon, A Oblakowska-Mucha, V Obraztsov, S Oggero, S Ogilvy, O Okhrimenko, R Oldeman, G Onderwater, M Orlandea, JM Otalora Goicochea, P Owen, A Oyanguren, BK Pal, A Palano, F Palombo, M Palutan, J Panman, A Papanestis, M Pappagallo, LL Pappalardo, C Parkes, CJ Parkinson, G Passaleva, GD Patel, M Patel, C Patrignani, A Pazos Alvarez, A Pearce, A Pellegrino, M Pepe Altarelli, S Perazzini, E Perez Trigo, P Perret, M Perrin-Terrin, L Pescatore, E Pesen, K Petridis, A Petrolini, E Picatoste Olloqui, B Pietrzyk, T Pilař, D Pinci, A Pistone, S Playfer, M Plo Casasus, F Polci, A Poluektov, E Polycarpo, A Popov, D Popov, B Popovici, C Potterat, E Price, JD Price, J Prisciandaro, A Pritchard, C Prouve, V Pugatch, A Puig Navarro, G Punzi, W Qian, B Rachwal, JH Rademacker, B Rakotomiaramanana, M Rama, MS Rangel, I Raniuk, N Rauschmayr, G Raven, F Redi, S Reichert, MM Reid, AC Dos Reis, S Ricciardi, S Richards, M Rihl, K Rinnert, V Rives Molina, P Robbe, AB Rodrigues, E Rodrigues, P Rodriguez Perez, S Roiser, V Romanovsky, A Romero Vidal, M Rotondo, J Rouvinet, T Ruf, H Ruiz, P Ruiz Valls, JJ Saborido Silva, N Sagidova, P Sail, B Saitta, V Salustino Guimaraes, C Sanchez Mayordomo, B Sanmartin Sedes, R Santacesaria, C Santamarina Rios, E Santovetti, A Sarti, C Satriano, A Satta, DM Saunders, M Savrie, D Savrina, M Schiller, H Schindler, M Schlupp, M Schmelling, B Schmidt, O Schneider, A Schopper, M-H Schune, R Schwemmer, B Sciascia, A Sciubba, M Seco, A Semennikov, I Sepp, N Serra, J Serrano, L Sestini, P Seyfert, M Shapkin, I Shapoval, Y Shcheglov, T Shears, L Shekhtman, V Shevchenko, A Shires, R Silva Coutinho, G Simi, M Sirendi, N Skidmore, T Skwarnicki, NA Smith, E Smith, E Smith, J Smith, M Smith, H Snoek, MD Sokoloff, FJP Soler, F Soomro, D Souza, B Souza De Paula, B Spaan, A Sparkes, P Spradlin, S Sridharan, F Stagni, M Stahl, S Stahl, O Steinkamp, O Stenyakin, S Stevenson, S Stoica, S Stone, B Storaci, S Stracka, M Straticiuc, U Straumann, R Stroili, VK Subbiah, L Sun, W Sutcliffe, K Swientek, S Swientek, V Syropoulos, M Szczekowski, P Szczypka, D Szilard, T Szumlak, S T'Jampens, M Teklishyn, G Tellarini, F Teubert, C Thomas, E Thomas, J van Tilburg, V Tisserand, M Tobin, S Tolk, L Tomassetti, D Tonelli, S Topp-Joergensen, N Torr, E Tournefier, S Tourneur, MT Tran, M Tresch, A Tsaregorodtsev, P Tsopelas, N Tuning, M Ubeda Garcia, A Ukleja, A Ustyuzhanin, U Uwer, C Vacca, V Vagnoni, G Valenti, A Vallier, R Vazquez Gomez, P Vazquez Regueiro, C Vázquez Sierra, C Vázquez Sierra, S Vecchi, JJ Velthuis, M Veltri, G Veneziano, M Vesterinen, B Viaud, D Vieira, M Vieites Diaz, X Vilasis-Cardona, A Vollhardt, D Volyanskyy, D Voong, A Vorobyev, V Vorobyev, C Voß, H Voss, JA de Vries, R Waldi, C Wallace, R Wallace, J Walsh, S Wandernoth, J Wang, DR Ward, NK Watson, D Websdale, M Whitehead, J Wicht, D Wiedner, G Wilkinson, MP Williams, M Williams, HW Wilschut, FF Wilson, J Wimberley, J Wishahi, W Wislicki, M Witek, G Wormser, SA Wotton, S Wright, K Wyllie, Y Xie, Z Xing, Z Xu, Z Yang, X Yuan, O Yushchenko, M Zangoli, M Zavertyaev, L Zhang, WC Zhang, Y Zhang, A Zhelezov, A Zhokhov, L Zhong, A Zvyagin

Abstract:

The production of the [Formula: see text] state in proton-proton collisions is probed via its decay to the [Formula: see text] final state with the LHCb detector, in the rapidity range [Formula: see text] and in the meson transverse-momentum range [Formula: see text]. The cross-section for prompt production of [Formula: see text] mesons relative to the prompt [Formula: see text] cross-section is measured, for the first time, to be [Formula: see text] at a centre-of-mass energy [Formula: see text] using data corresponding to an integrated luminosity of 0.7 fb[Formula: see text], and [Formula: see text] at [Formula: see text] using 2.0 fb[Formula: see text]. The uncertainties quoted are, in order, statistical, systematic, and that on the ratio of branching fractions of the [Formula: see text] and [Formula: see text] decays to the [Formula: see text] final state. In addition, the inclusive branching fraction of [Formula: see text]-hadron decays into [Formula: see text] mesons is measured, for the first time, to be [Formula: see text], where the third uncertainty includes also the uncertainty on the [Formula: see text] inclusive branching fraction from [Formula: see text]-hadron decays. The difference between the [Formula: see text] and [Formula: see text] meson masses is determined to be [Formula: see text].

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Measurement of the semileptonic CP asymmetry in B0-B[over ¯]0 mixing.

Physical review letters 114:4 (2015) 041601

Authors:

R Aaij, B Adeva, M Adinolfi, A Affolder, Z Ajaltouni, S Akar, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, S Amerio, Y Amhis, L An, L Anderlini, J Anderson, R Andreassen, M Andreotti, JE Andrews, RB Appleby, O Aquines Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, M Baalouch, S Bachmann, JJ Back, A Badalov, C Baesso, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, A Berezhnoy, R Bernet, M-O Bettler, M van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, PM Bjørnstad, T Blake, F Blanc, J Blouw, S Blusk, V Bocci, A Bondar, N Bondar, W Bonivento, S Borghi, A Borgia, M Borsato, TJV Bowcock, E Bowen, C Bozzi, T Brambach, D Brett, M Britsch, T Britton, J Brodzicka, NH Brook, H Brown, A Bursche, J Buytaert, S Cadeddu, R Calabrese, M Calvi, M Calvo Gomez, P Campana, D Campora Perez, A Carbone, G Carboni, R Cardinale, A Cardini, L Carson, K Carvalho Akiba, G Casse, L Cassina, L Castillo Garcia, M Cattaneo, Ch Cauet, R Cenci, M Charles, Ph Charpentier, M Chefdeville, S Chen, S-F Cheung, N Chiapolini, M Chrzaszcz, X Cid Vidal, G Ciezarek, PEL Clarke, M Clemencic, HV Cliff, J Closier, V Coco, J Cogan, E Cogneras, V Cogoni, L Cojocariu, G Collazuol, P Collins, A Comerma-Montells, A Contu, A Cook, M Coombes, S Coquereau, G Corti, M Corvo, I Counts, B Couturier, GA Cowan, DC Craik, M Cruz Torres, S Cunliffe, R Currie, C D'Ambrosio, J Dalseno, P David, PNY David, A Davis, K De Bruyn, S De Capua, M De Cian, JM De Miranda, L De Paula, W De Silva, P De Simone, C-T Dean, D Decamp, M Deckenhoff, L Del Buono, N Déléage, D Derkach, O Deschamps, F Dettori, A Di Canto, H Dijkstra, S Donleavy, F Dordei, M Dorigo, A Dosil Suárez, D Dossett, A Dovbnya, K Dreimanis, G Dujany, F Dupertuis, P Durante, R Dzhelyadin, A Dziurda, A Dzyuba, S Easo, U Egede, V Egorychev, S Eidelman, S Eisenhardt, U Eitschberger, R Ekelhof, L Eklund, I El Rifai, Ch Elsasser, S Ely, S Esen, H-M Evans, T Evans, A Falabella, C Färber, C Farinelli, N Farley, S Farry, RF Fay, D Ferguson, V Fernandez Albor, F Ferreira Rodrigues, M Ferro-Luzzi, S Filippov, M Fiore, M Fiorini, M Firlej, C Fitzpatrick, T Fiutowski, P Fol, M Fontana, F Fontanelli, R Forty, O Francisco, M Frank, C Frei, M Frosini, J Fu, E Furfaro, A Gallas Torreira, D Galli, S Gallorini, S Gambetta, M Gandelman, P Gandini, Y Gao, J García Pardiñas, J Garofoli, J Garra Tico, L Garrido, D Gascon, C Gaspar, R Gauld, L Gavardi, A Geraci, E Gersabeck, M Gersabeck, T Gershon, Ph Ghez, A Gianelle, S Gianì, V Gibson, L Giubega, VV Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, C Gotti, M Grabalosa Gándara, R Graciani Diaz, LA Granado Cardoso, E Graugés, E Graverini, G Graziani, A Grecu, E Greening, S Gregson, P Griffith, L Grillo, O Grünberg, B Gui, E Gushchin, Yu Guz, T Gys, C Hadjivasiliou, G Haefeli, C Haen, SC Haines, S Hall, B Hamilton, T Hampson, X Han, S Hansmann-Menzemer, N Harnew, ST Harnew, J Harrison, J He, T Head, V Heijne, K Hennessy, P Henrard, L Henry, JA Hernando Morata, E van Herwijnen, M Heß, A Hicheur, D Hill, M Hoballah, C Hombach, W Hulsbergen, P Hunt, N Hussain, D Hutchcroft, D Hynds, M Idzik, P Ilten, R Jacobsson, A Jaeger, J Jalocha, E Jans, P Jaton, A Jawahery, F Jing, M John, D Johnson, CR Jones, C Joram, B Jost, N Jurik, S Kandybei, W Kanso, M Karacson, TM Karbach, S Karodia, M Kelsey, IR Kenyon, T Ketel, B Khanji, C Khurewathanakul, S Klaver, K Klimaszewski, O Kochebina, M Kolpin, I Komarov, RF Koopman, P Koppenburg, M Korolev, A Kozlinskiy, L Kravchuk, K Kreplin, M Kreps, G Krocker, P Krokovny, F Kruse, W Kucewicz, M Kucharczyk, V Kudryavtsev, K Kurek, T Kvaratskheliya, VN La Thi, D Lacarrere, G Lafferty, A Lai, D Lambert, RW Lambert, G Lanfranchi, C Langenbruch, B Langhans, T Latham, C Lazzeroni, R Le Gac, J van Leerdam, J-P Lees, R Lefèvre, A Leflat, J Lefrançois, S Leo, O Leroy, T Lesiak, B Leverington, Y Li, T Likhomanenko, M Liles, R Lindner, C Linn, F Lionetto, B Liu, S Lohn, I Longstaff, JH Lopes, N Lopez-March, P Lowdon, D Lucchesi, H Luo, A Lupato, E Luppi, O Lupton, F Machefert, IV Machikhiliyan, F Maciuc, O Maev, S Malde, A Malinin, G Manca, G Mancinelli, A Mapelli, J Maratas, JF Marchand, U Marconi, C Marin Benito, P Marino, R Märki, J Marks, G Martellotti, A Martín Sánchez, M Martinelli, D Martinez Santos, F Martinez Vidal, D Martins Tostes, A Massafferri, R Matev, Z Mathe, C Matteuzzi, B Maurin, A Mazurov, M McCann, J McCarthy, A McNab, R McNulty, B McSkelly, B Meadows, F Meier, M Meissner, M Merk, DA Milanes, M-N Minard, N Moggi, J Molina Rodriguez, S Monteil, M Morandin, P Morawski, A Mordà, MJ Morello, J Moron, A-B Morris, R Mountain, F Muheim, K Müller, M Mussini, B Muster, P Naik, T Nakada, R Nandakumar, I Nasteva, M Needham, N Neri, S Neubert, N Neufeld, M Neuner, AD Nguyen, TD Nguyen, C Nguyen-Mau, M Nicol, V Niess, R Niet, N Nikitin, T Nikodem, A Novoselov, DP O'Hanlon, A Oblakowska-Mucha, V Obraztsov, S Oggero, S Ogilvy, O Okhrimenko, R Oldeman, CJG Onderwater, M Orlandea, JM Otalora Goicochea, A Otto, P Owen, A Oyanguren, BK Pal, A Palano, F Palombo, M Palutan, J Panman, A Papanestis, M Pappagallo, LL Pappalardo, C Parkes, CJ Parkinson, G Passaleva, GD Patel, M Patel, C Patrignani, A Pearce, A Pellegrino, M Pepe Altarelli, S Perazzini, P Perret, M Perrin-Terrin, L Pescatore, E Pesen, K Petridis, A Petrolini, E Picatoste Olloqui, B Pietrzyk, T Pilař, D Pinci, A Pistone, S Playfer, M Plo Casasus, F Polci, A Poluektov, E Polycarpo, A Popov, D Popov, B Popovici, C Potterat, E Price, JD Price, J Prisciandaro, A Pritchard, C Prouve, V Pugatch, A Puig Navarro, G Punzi, W Qian, B Rachwal, JH Rademacker, B Rakotomiaramanana, M Rama, MS Rangel, I Raniuk, N Rauschmayr, G Raven, F Redi, S Reichert, MM Reid, AC dos Reis, S Ricciardi, S Richards, M Rihl, K Rinnert, V Rives Molina, P Robbe, AB Rodrigues, E Rodrigues, P Rodriguez Perez, S Roiser, V Romanovsky, A Romero Vidal, M Rotondo, J Rouvinet, T Ruf, H Ruiz, P Ruiz Valls, JJ Saborido Silva, N Sagidova, P Sail, B Saitta, V Salustino Guimaraes, C Sanchez Mayordomo, B Sanmartin Sedes, R Santacesaria, C Santamarina Rios, E Santovetti, A Sarti, C Satriano, A Satta, DM Saunders, D Savrina, M Schiller, H Schindler, M Schlupp, M Schmelling, B Schmidt, O Schneider, A Schopper, M Schubiger, M-H Schune, R Schwemmer, B Sciascia, A Sciubba, A Semennikov, I Sepp, N Serra, J Serrano, L Sestini, P Seyfert, M Shapkin, I Shapoval, Y Shcheglov, T Shears, L Shekhtman, V Shevchenko, A Shires, R Silva Coutinho, G Simi, M Sirendi, N Skidmore, I Skillicorn, T Skwarnicki, NA Smith, E Smith, E Smith, J Smith, M Smith, H Snoek, MD Sokoloff, FJP Soler, F Soomro, D Souza, B Souza De Paula, B Spaan, P Spradlin, S Sridharan, F Stagni, M Stahl, S Stahl, O Steinkamp, O Stenyakin, S Stevenson, S Stoica, S Stone, B Storaci, S Stracka, M Straticiuc, U Straumann, R Stroili, VK Subbiah, L Sun, W Sutcliffe, K Swientek, S Swientek, V Syropoulos, M Szczekowski, P Szczypka, T Szumlak, S T'Jampens, M Teklishyn, G Tellarini, F Teubert, C Thomas, E Thomas, J van Tilburg, V Tisserand, M Tobin, J Todd, S Tolk, L Tomassetti, D Tonelli, S Topp-Joergensen, N Torr, E Tournefier, S Tourneur, MT Tran, M Tresch, A Trisovic, A Tsaregorodtsev, P Tsopelas, N Tuning, M Ubeda Garcia, A Ukleja, A Ustyuzhanin, U Uwer, C Vacca, V Vagnoni, G Valenti, A Vallier, R Vazquez Gomez, P Vazquez Regueiro, C Vázquez Sierra, C Vázquez Sierra, S Vecchi, JJ Velthuis, M Veltri, G Veneziano, M Vesterinen, B Viaud, D Vieira, M Vieites Diaz, X Vilasis-Cardona, A Vollhardt, D Volyanskyy, D Voong, A Vorobyev, V Vorobyev, C Voß, JA de Vries, R Waldi, C Wallace, R Wallace, J Walsh, S Wandernoth, J Wang, DR Ward, NK Watson, D Websdale, M Whitehead, J Wicht, D Wiedner, G Wilkinson, M Wilkinson, MP Williams, M Williams, HW Wilschut, FF Wilson, J Wimberley, J Wishahi, W Wislicki, M Witek, G Wormser, SA Wotton, S Wright, K Wyllie, Y Xie, Z Xing, Z Xu, Z Yang, X Yuan, O Yushchenko, M Zangoli, M Zavertyaev, L Zhang, WC Zhang, Y Zhang, A Zhelezov, A Zhokhov, L Zhong, LHCb Collaboration

Abstract:

The semileptonic CP asymmetry in B0-B[over ¯]0 mixing, a(sl)(d), is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb-1, recorded by the LHCb experiment. Semileptonic B0 decays are reconstructed in the inclusive final states D-μ+ and D*-μ+, where the D- meson decays into the K+π-π- final state and the D*- meson into the D[over ¯]0(→K+π-)π- final state. The asymmetry between the numbers of D(*)-μ+ and D(*)+μ- decays is measured as a function of the decay time of the B0 mesons. The CP asymmetry is measured to be a(sl)(d)=(-0.02±0.19±0.30)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of a(sl)(d) to date and is consistent with the prediction from the standard model.

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Study of the rare B⁰s and B⁰ decays into the π⁺π^-μ⁺μ^- final state

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Study of η − η^′ mixing from measurement of B (s)⁰ → J/ψη^(′) decay rates

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Measurement of the Z+b-jet cross-section in pp collisions at s = 7 TeV in the forward region

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Measurement of the [Formula: see text] production cross-section in proton-proton collisions via the decay [Formula: see text].

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Measurement of the semileptonic CP asymmetry in B0-B[over ¯]0 mixing.

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Study of the rare B0s and B0 decays into the π+π-μ+μ- final state

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Study of η − η′ mixing from measurement of B (s)0 → J/ψη(′) decay rates

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Measurement of the Z+b-jet cross-section in pp collisions at s = 7 TeV in the forward region

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Measurement of the [Formula: see text] production cross-section in proton-proton collisions via the decay [Formula: see text].

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Measurement of the semileptonic CP asymmetry in B0-B[over ¯]0 mixing.

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Study of the rare B⁰s and B⁰ decays into the π⁺π^-μ⁺μ^- final state

Study of η − η^′ mixing from measurement of B (s)⁰ → J/ψη^(′) decay rates