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Measurement of the $B_s^0$ meson lifetime in $D_s^+\pi^-$ decays

(2014)

Authors:

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, 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 van den Brand, 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, 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, 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, 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, E Gersabeck, M Gersabeck, T Gershon, Ph Ghez, A Gianelle, S Giani', 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, H Lu, 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, 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, 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, S Reichert, MM Reid, AC dos Reis, S Ricciardi, S Richards, M Rihl, K Rinnert, V Rives Molina, DA Roa Romero, P Robbe, AB Rodrigues, E Rodrigues, P Rodriguez Perez, S Roiser, V Romanovsky, A Romero Vidal, M Rotondo, J Rouvinet, T Ruf, F Ruffini, 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, 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, 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, FF Wilson, J Wimberley, J Wishahi, W Wislicki, M Witek, G Wormser, SA Wotton, S Wright, S Wu, 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
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Study of (Formula presented.) production and cold nuclear matter effects in pPB collisions at (Formula presented.) TeV

Journal of High Energy Physics 2014:7 (2014)

Authors:

R Aaij, B Adeva, M Adinolfi, AA Affolder, ZJ Ajaltouni, J Albrecht, F Alessio, MT Alexander, SN Ali, GD Alkhazov, P Alvarez Cartelle, AA Alves, SF Amato, S Amerio, Y Amhis, L An, L Anderlini, JT Anderson, RE Andreassen, M Andreotti, JE Andrews, RB Appleby, OAO Aquines Gutierrez, F Archilli, AV Artamonov, M Artuso, EL Aslanides, G Auriemma, M Baalouch, S Bachmann, J Back, A Badalov, V Balagura, W Baldini, R Barlow, C Barschel, SY Barsuk, W Barter, VS Batozskaya, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga, SG Belogurov, KS Belous, IM Belyaev, E Ben-Haim, G Bencivenni, S Benson, J Benton, AV Berezhnoy, R Bernet, MO Bettler, MG Van Beuzekom, A Bien, S Bifani, T Bird, A Bizzeti, PM Bjørnstad, TA Blake, F Blanc, J Blouw, SR Blusk, V Bocci, AE Bondar, NF Bondar, WM Bonivento, SLS Borghi, A Borgia, M Borsato, TJV Bowcock, EE Bowen, C Bozzi, T Brambach, JFJVD Van Den Brand, J Bressieux, DR Brett, M Britsch, T Britton, J Brodzicka, NH Brook, HN Brown, A Bursche, G Busetto, JAMA Buytaert, S Cadeddu, R Calabrese, M Calvi, M Calvo Gomez, A Camboni, PL Campana, D Campora Perez, A Carbone, G Carboni, R Cardinale, A Cardini, H Carranza-Mejia, L Carson, K Carvalho Akiba, GL Casse, L Cassina, L Castillo García, M Cattaneo, CH Cauet, R Cenci, MJ Charles, PH Charpentier, S Chen, SF Cheung, N Chiapolini, M Chrza̧szcz, KD Ciba, X Cid Vidal, G Ciezarek, PELL Clarke, M Clemencic, HV Cliff, J Closier, V Coco, JG Cogan, E Cogneras, PP Collins, A Comerma-Montells, A Contu, AJR Cook, MJ Coombes, S Coquereau, G Corti, M Corvo, I Counts, B Couturier, GA Cowan, DC Craik, MH Cruz Torres, S Cunliffe, R Currie, C D Ambrosio, JP Dalseno, PY David, PNY David, A Davis, K De Bruyn, S De Capua, M De Cian, JM De Miranda, LS De Paula, WM De Silva, P De Simone, D Décamp, M Deckenhoff, L Del Buono, N Déléage, DA Derkach, O Deschamps, F Dettori, A Di Canto, HB Dijkstra, S Donleavy, F Dordei, M Dorigo, A Dosil Suárez, D Dossett, AM Dovbnya, G Dujany, F Dupertuis, P Durante, RI Dzhelyadin, A Dziurda, AA Dzyuba, S Easo, U Egede, VY Egorychev, SI Eidelman, S Eisenhardt, U Eitschberger, R Ekelhof, LM Eklund, I El Rifai, CH Elsässer, SR Ely, S Esen, TM Evans, A Falabella, C Färber, C Farinelli, NRS Farley, S Farry, DPS Ferguson, V Fernández Albor, F Ferreira Rodrigues, M Ferro-Luzzi, SN Filippov, M Fiore, M Fiorini, M Firlej, CR Fitzpatrick, T Fiutowski, M Fontana, F Fontanelli, RW Forty, ON Francisco, MJ Frank, C Frei, M Frosini, J Fu, E Furfaro, AA Gallas Torreira, D Galli, S Gallorini, S Gambetta, M Gandelman, P Gandini, Y Gao, JA Garofoli, J Garra Tico, LI Garrido, C Gaspar, R Gauld, L Gavardi, EM Gersabeck, M Gersabeck, TJ Gershon, PH Ghez, A Gianelle, S Giani, V Gibson, L Giubega, VV Gligorov, C Göbel, DY Golubkov, AI Golutvin, AM Gomes, HA Gordon, C Gotti, M Grabalosa Gándara, R Graciani Díaz, LA Granado Cardoso, E Graugés, G Graziani, AT Grecu, E Greening, SF Gregson, P Griffith, L Grillo, O Grünberg, B Gui, EN Gushchin, YP 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, JE Harrison, TW Hartmann, J He, TL Head, V Heijne, K Hennessy, P Henrard, LP Henry, JA Hernando Morata, EE Van Herwijnen, MF Heß, A Hicheur, DG Hill, M Hoballah, C Hombach, WD Hulsbergen, PJ Hunt, N Hussain, DE Hutchcroft, D Hynds, M Idzik, PH Ilten, R Jacobsson, A Jaeger, J Jalocha, E Jans, P Jaton, A Jawahery, M Jez̀abek, FF Jing, MJJ John, DRE Johnson, CR Jones, C Joram, B Jost, N Jurik, M Kaballo, SS Kandybei, W Kanso, M Karacson, TM Karbach, MH Kelsey, IR Kenyon, TJ Ketel, B Khanji, C Khurewathanakul, S Klaver, O Kochebina, M Kolpin, I Komarov, RF Koopman, P Koppenburg, MG Korolev, A Kozlinskiy, LV Kravchuk, K Kreplin, M Kreps, G Krocker, P Krokovny, F Kruse, M Kucharczyk, VN Kudryavtsev, K Kurek, TG Kvaratskheliya, VN La Thi, D Lacarrère, GD Lafferty, A Lai, DJ Lambert, RW Lambert, E Lanciotti, G Lanfranchi, C Langenbruch, B Langhans, TE Latham, C Lazzeroni, R Le Gac, J Van Leerdam, JP Lees, RP Lefèvre, AK Leflat, J Lefrançois, S Leo, O Leroy, T Lesiak, BD Leverington, Y Li, M Liles, R Lindner, C Linn, F Lionetto, B Liu, G Liu, SB Lohn, I Longstaff, JH Lopes, N Lopez-March, PJ Lowdon, H Lu, D Lucchesi, H Luo, A Lupato, E Luppi, O Lupton, F MacHefert, IV MacHikhiliyan, FC MacIuc, OE Maev, S Malde, G Manca, G Mancinelli, M Manzali, J Maratas, JF Marchand, UMBE Marconi, C Marin Benito, P Marino, R Märki, J Marks, G Martellotti, A Martens, A Martín Sánchez, M Martinelli, D Martínez Santos, F Martínez-Vidal, D Martins Tostes, AM Massafferri, R Matev, Z Màthè, C Matteuzzi, AE Mazurov, MJ McCann, J McCarthy, AI McNab, R McNulty, B McSkelly, BT Meadows, F Meier, M Meissner, M Merk, DA Milanés, MN Minard, N Moggi, J Molinâ Rodriguez, S Monteil, D Moran, M Morandin, PA Morawski, A Mordà, MJ Morello, J Moroń, AB Morris, RJ Moüntain, F Muheim, KA Müller, RA Mureşan, M Mussini, B Muster, P Naik, T Nakada, R Nandakumar, I Nasteva, MD Needham, N Neri, S Neubert, N Neufeld, M Neuner, AD Nguyen, TD Nguyen, C Nguyen-Mau, M Nicol, V Niess, R Niet, NV Nikitin, T Nikodem, AA Novoselov, A Oblakowska-Mucha, VF Obraztsov, S Oggero, S Ogilvy, OY Okhrimenko, RGC Oldeman, GJG Onderwater, MC Orlandea, JM Otalora Goicochea, P Owen, A Oyanguren, BK Pal, A Palano, FF Palombo, M Palutan, JK Panman, A Papanestis, M Pappagallo, C Parkes, CJ Parkinson, G Passaleva, GD Patel, MR Patel, C Patrignani, A Pazos Alvarez, AK Pearce, AR Pellegrino, M Pepe Altarelli, S Perazzini, E Pérez Trigo, P Perret, M Perrin-Terrin, L Pescatore, E Pesen, KA Petridis, A Petrolini, E Picatoste Olloqui, B Pietrzyk, T Pilař, D Pinci, A Pistone, SM Playfer, M Pló Casasús, F Polci, AO Poluektov, E Polycarpo, D Popov, D Popov, B Popovici, C Potterat, AW Powell, J Prisciandaro, A Pritchard, C Prouve, VM Pugatch, A Puig Navarro, G Punzi, W Qian, B Rachwal, JH Rademacker, B Rakotomiaramanana, MJR Rama, MS Rangel, I Raniuk, N Rauschmayr, G Raven, S Reichert, MM Reid, AC Dos Reis, S Ricciardi, AJ Richards, M Rihl, K Rinnert, V Rives Molina, DA Roa Romero, P Robbe, AB Rodrigues, E Rodrigues, P Rodríguez Pérez, S Roiser, VI Romanovsky, AR Romero Vidal, M Rotondo, J Rouvinet, T Ruf, F Ruffini, H Ruiz, P Ruiz Valls, G Sabatino, 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, MV Sapunov, A Sarti, C Satriano, A Satta, M Savrié, DV Savrina, M Schiller, H Schindler, M Schlupp, M Schmelling, B Schmidt, O Schneider, A Schopper, MH Schune, R Schwemmer, B Sciascia, A Sciubba, M Seco, AI Semennikov, K Senderowska, I Sepp, N Serra, J Serrano, L Sestini, P Seyfert, MM Shapkin, II Shapoval, YA Shcheglov, TG Shears, LI Shekhtman, VI Shevchenko, A Shires, R Silva Coutinho, G Simi, M Sirendi, N Skidmore, T Skwarnicki, NA Smith, ER Smith, EH Smith, JG Smith, MG Smith, HL Snoek, MD Sokoloff, FJP Soler, F Soomro, D Souza, B Souza De Paula, B Spaan, A Sparkes, F Spinella, P Spradlin, F Stagni, S Stahl, O Steinkamp, OV Stenyakin, S Stevenson, S Stoica, SL Stone, B Storaci, S Stracka, M Straticiuc, U Straumann, R Stroili, VK Subbiah, L Sun, W Sutcliffe, S Swientek, S Swientek, V Syropoulos, M Szczekowski, PM Szczypka, D Szilard, T Szumlak, S T Jampens, M Teklishyn, G Tellarini, F Teubert, CE Thomas, EW Thomas, JWW Van Tilburg, V Tisserand, M Tobin, S Tolk, L Tomassetti, D Tonelli, S Topp-Joergensen, N Torr, E Tournefier, S Tourneur, MT Trân, M Tresch, AM Tsaregorodtsev, P Tsopelas, N Tuning, M Úbeda García, A Ukleja, A Ustyuzhanin, U Uwer, VM Vagnoni, G Valenti, A Vallier, R Vazquez Gomez, P Vazquez Regueiro, C Vázquez Sierra, S Vecchi, JJ Velthuis, M Veltri, G Veneziano, M Vesterinen, BF Viaud, D Vieira, M Vieites Diaz, X Vilasís-Cardona, A Vollhardt, D Volyanskyy, D Voong, AS Vorobyev, V Vorobyev, C Voß, HH Voss, JA De Vries, R Waldi, CD Wallace, R Wallace, JJ Walsh, S Wandernoth, J Wang, DR Ward, NK Watson, DM Websdale, M Whitehead, J Wicht, D Wiedner, GR Wilkinson, MP Williams, MD Williams, FF Wilson, J Wimberley, J Wishahi, W Wiślicki, M Witek, G Wormser, SA Wotton, SJ Wright, S Wu, KH Wyllie, Y Xie, Z Xing, Z Xu, Z Yang, X Yuan, OP Yushchenko, M Zangoli, MV Zavertyaev, F Zhang, L Zhang, WC Zhang, Y Zhang, A Zhelezov, AA Zhokhov, L Zhong, A Zvyagin

Abstract:

© Open Access. Production of (Formula presented.) mesons in proton-lead collisions at a nucleon-nucleon centre of-mass energy (Formula presented.) TeV is studied with the LHCb detector. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6 nb-1. The (Formula presented.) mesons of transverse momenta up to 15 GeV/c are reconstructed in the dimuon decay mode. The rapidity coverage in the centre-of-mass system is 1.5 < y < 4.0 (forward region) and -5.0 < y < -2.5 (backward region). The forward-backward production ratio and the nuclear modification factor for (Formula presented.)(1S) mesons are determined. The data are compatible with the predictions for a suppression of (Formula presented.) (1S) production with respect to proton-proton collisions in the forward region, and an enhancement in the backward region. The suppression is found to be smaller than in the case of prompt (Formula presented.) mesons.
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Precision measurement of the mass and lifetime of the Ξ0b Baryon

Physical Review Letters 113:3 (2014)

Authors:

R Aaij, R Aaijsp, 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, V Balagura, 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, MO 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 Van Den Brand, 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, A Camboni, P Campana, D Campora Perez, A Carbone, G Carboni, R Cardinale, A Cardini

Abstract:

Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb-1 collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Ξ0b Ξ+cπ-, Ξc+ pK-π+ signal decays are reconstructed. From this sample, the first measurement of the Ξ0b baryon lifetime is made, relative to that of the Λ0b baryon. The mass differences M(Ξ0b) - M(Λ0b) and M(Ξc+) - M(Λc+) are also measured with precision more than 4 times better than the current world averages. The resulting values are (Equation presented) where the first factor is the ratio of fragmentation fractions, b Ξ0b relative to b Λ0b. Relative production rates as functions of transverse momentum and pseudorapidity are also presented.
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Timing performance of a MCP photon detector read out with multi-channel electronics for the TORCH system

Astroparticle, particle, space physics and detectors for physics applications : proceedings of the 14th ICATPP Conference, Como, Italy, 23-27 September 2013 World Scientific Publishing (2014) 633-638

Authors:

L Castillo García, JM Fopma, R Forty, C Frei, Rui Gao, T Gys, Neville Harnew, T Piedigrossi

Abstract:

As part of the R&D; phase of the (Time Of internally Reflected Cherenkov light) TORCH project, 8x8 pad micro-channel plate photon detectors are being characterized. Multichannel electronics based on fast amplifier discriminator and time digitization conversion ASTCs are used to read out and time the charge signals from single photoelectrons. The MCP performance is investigated with a 20ps pulsed blue laser diode. A time resolution of 90ps is achieved. Timing properties are obtained at modest MCP gain, without time walk correction and no fine calibration of the time-to-digital converter circuit. The reference time is provided by a single-channel MCP photon detector coupled to a Constant Fraction Discriminator. Photoelectron detection efficiencies and back-scattering effect are discussed together with the laser source influence on the timing performance.
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Details from ORA

Measurement of CP violation in $B_s^0 \to \phi \phi$ decays

(2014)

Authors:

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, V Balagura, 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 van den Brand, 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, 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, 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, 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, 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, E Gersabeck, M Gersabeck, T Gershon, Ph Ghez, A Gianelle, S Giani', V Gibson, L Giubega, VV Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, H Gordon, 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, G Liu, S Lohn, I Longstaff, JH Lopes, N Lopez-March, P Lowdon, H Lu, D Lucchesi, H Luo, A Lupato, E Luppi, O Lupton, F Machefert, IV Machikhiliyan, F Maciuc, O Maev, S Malde, G Manca, G Mancinelli, 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, 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, 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, S Reichert, MM Reid, AC dos Reis, S Ricciardi, S Richards, M Rihl, K Rinnert, V Rives Molina, DA Roa Romero, P Robbe, AB Rodrigues, E Rodrigues, P Rodriguez Perez, S Roiser, V Romanovsky, A Romero Vidal, M Rotondo, J Rouvinet, T Ruf, F Ruffini, 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, 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, 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, FF Wilson, J Wimberley, J Wishahi, W Wislicki, M Witek, G Wormser, SA Wotton, S Wright, S Wu, 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
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