Observation of the decay Bc+→Bs0π+

Physical Review Letters 111:18 (2013)

Authors:

R Aaij, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, S Amerio, Y Amhis, L Anderlini, J Anderson, R Andreassen, JE Andrews, RB Appleby, O Aquines Gutierrez, F Archilli, A Artamonov, M Artuso, E Aslanides, G Auriemma, M Baalouch, S Bachmann, JJ Back, C Baesso, V Balagura, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, T Bauer, A Bay, 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, TJV Bowcock, E Bowen, C Bozzi, T Brambach, J Van Den Brand, J Bressieux, D Brett, M Britsch, T Britton, NH Brook, H Brown, A Bursche, G Busetto, J Buytaert, S Cadeddu, O Callot, M Calvi, M Calvo Gomez, A Camboni, P Campana, D Campora Perez, A Carbone, G Carboni, R Cardinale, A Cardini, H Carranza-Mejia, L Carson, K Carvalho Akiba, G Casse, L Cassina, L Castillo Garcia, M Cattaneo

Abstract:

The result of a search for the decay Bc+→Bs0π+ is presented, using the Bs0→Ds-π+ and Bs0→J/ψ channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 1 fb-1 taken at a center-of-mass energy of 7 TeV, and 2 fb-1 taken at 8 TeV. The decay Bc+→Bs0π+ is observed with significance in excess of 5 standard deviations independently in both decay channels. The measured product of the ratio of cross sections and branching fraction is [σ(Bc+)/ σ(Bs0)]×B(Bc+→Bs0π+)=[2.37±0.31 (stat)±0.11 (syst)-0.13+0.17(τBc+)]×10-3, in the pseudorapidity range 2<η(B)<5, where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the Bc+ lifetime. This is the first observation of a B meson decaying to another B meson via the weak interaction. © 2013 CERN. Published by the American Physical Society.

Molecular mechanisms of HIV type 1 prophylaxis failure revealed by single-genome sequencing.

The Journal of infectious diseases 208:10 (2013) 1598-1603

Authors:

Hui Li, Lily Blair, Yalu Chen, Gerald Learn, Katja Pfafferott, Mina John, Tanmoy Bhattacharya, Beatrice H Hahn, Simon Mallal, George M Shaw, Katharine J Bar

Abstract:

Trials of human immunodeficiency virus type 1 (HIV) pre- and postexposure prophylaxis show promise. Here, we describe a novel strategy for deciphering mechanisms of prophylaxis failure that could improve therapeutic outcomes. A healthcare worker began antiretroviral prophylaxis immediately after a high-risk needlestick injury but nonetheless became viremic 11 weeks later. Single-genome sequencing of plasma viral RNA identified 15 drug susceptible transmitted/founder HIV genomes responsible for productive infection. Sequences emanating from these genomes exhibited extremely low diversity, suggesting virus sequestration as opposed to low-level replication as the cause of breakthrough infection. Identification of transmitted/founder viruses allows for genome-wide assessment of molecular mechanisms of prophylaxis failure.

The BaBar detector: Upgrades, operation and performance

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 729 (2013) 615-701

Authors:

B Aubert, R Barate, D Boutigny, F Couderc, P del Amo Sanchez, J-M Gaillard, A Hicheur, Y Karyotakis, JP Lees, V Poireau, X Prudent, P Robbe, V Tisserand, A Zghiche, E Grauges, J Garra Tico, L Lopez, M Martinelli, A Palano, M Pappagallo, A Pompili, GP Chen, JC Chen, ND Qi, G Rong, P Wang, YS Zhu, G Eigen, B Stugu, L Sun, GS Abrams, M Battaglia, AW Borgland, AB Breon, DN Brown, J Button-Shafer, RN Cahn, E Charles, AR Clark, CT Day, M Furman, MS Gill, Y Groysman, RG Jacobsen, RW Kadel, JA Kadyk, LT Kerth, Yu G Kolomensky, JF Kral, G Kukartsev, C LeClerc, ME Levi, G Lynch, AM Merchant, LM Mir, PJ Oddone, TJ Orimoto, IL Osipenkov, M Pripstein, NA Roe, A Romosan, MT Ronan, VG Shelkov, A Suzuki, K Tackmann, T Tanabe, WA Wenzel, M Zisman, M Barrett, PG Bright-Thomas, KE Ford, TJ Harrison, AJ Hart, CM Hawkes, DJ Knowles, SE Morgan, SW O'Neale, RC Penny, D Smith, N Soni, AT Watson, NK Watson, K Goetzen, T Held, H Koch, M Kunze, B Lewandowski, M Pelizaeus, K Peters, H Schmuecker, T Schroeder, M Steinke, A Fella, E Antonioli, JT Boyd, N Chevalier, WN Cottingham, B Foster, C Mackay, D Walker, K Abe, DJ Asgeirsson, T Cuhadar-Donszelmann, BG Fulsom, C Hearty, NS Knecht, TS Mattison, JA McKenna, D Thiessen, A Khan, P Kyberd, AK McKemey, A Randle-Conde, M Saleem, DJ Sherwood, L Teodorescu, VE Blinov, AD Bukin, AR Buzykaev, VP Druzhinin, VB Golubev, AA Korol, EA Kravchenko, AP Onuchin, SI Serednyakov, Yu I Skovpen, EP Solodov, VI Telnov, K Yu Todyshev, AN Yushkov, DS Best, M Bondioli, M Bruinsma, M Chao, S Curry, I Eschrich, D Kirkby, AJ Lankford, M Mandelkern, EC Martin, S McMahon, RK Mommsen, DP Stoker, S Abachi, C Buchanan, BL Hartfiel, AJR Weinstein, H Atmacan, SD Foulkes, JW Gary, J Layter, F Liu, O Long, BC Shen, GM Vitug, K Wang, Z Yasin, L Zhang, HK Hadavand, EJ Hill, HP Paar, S Rahatlou, U Schwanke, V Sharma, JW Berryhill, C Campagnari, A Cunha, B Dahmes, TM Hong, D Kovalskyi, N Kuznetsova, SL Levy, A Lu, MA Mazur, JD Richman, W Verkerke, TW Beck, J Beringer, AM Eisner, CJ Flacco, AA Grillo, M Grothe, CA Heusch, J Kroseberg, WS Lockman, AJ Martinez, G Nesom, T Schalk, RE Schmitz, BA Schumm, A Seiden, E Spencer, P Spradlin, M Turri, W Walkowiak, L Wang, M Wilder, DC Williams, MG Wilson, LO Winstrom, E Chen, CH Cheng, DA Doll, MP Dorsten, A Dvoretskii, B Echenard, RJ Erwin, F Fang, K Flood, DG Hitlin, S Metzler, I Narsky, J Oyang, T Piatenko, FC Porter, A Ryd, A Samuel, S Yang, RY Zhu, R Andreassen, S Devmal, TL Geld, S Jayatilleke, G Mancinelli, BT Meadows, K Mishra, MD Sokoloff, T Abe, EA Antillon, T Barillari, J Becker, F Blanc, PC Bloom, S Chen, ZC Clifton, IM Derrington, J Destree, MO Dima, WT Ford, A Gaz, JD Gilman, J Hachtel, JF Hirschauer, DR Johnson, A Kreisel, M Nagel, U Nauenberg, A Olivas, P Rankin, J Roy, WO Ruddick, JG Smith, KA Ulmer, WC van Hoek, SR Wagner, CG West, J Zhang, R Ayad, J Blouw, A Chen, EA Eckhart, JL Harton, T Hu, WH Toki, RJ Wilson, F Winklmeier, QL Zeng, D Altenburg, E Feltresi, A Hauke, H Jasper, M Karbach, J Merkel, A Petzold, B Spaan, K Wacker, T Brandt, J Brose, T Colberg, G Dahlinger, M Dickopp, P Eckstein, H Futterschneider, S Kaiser, MJ Kobel, R Krause, R Müller-Pfefferkorn, WF Mader, E Maly, R Nogowski, S Otto, J Schubert, KR Schubert, R Schwierz, JE Sundermann, A Volk, L Wilden, D Bernard, F Brochard, J Cohen-Tanugi, F Dohou, S Ferrag, E Latour, A Mathieu, C Renard, S Schrenk, S T'Jampens, Ch Thiebaux, G Vasileiadis, M Verderi, A Anjomshoaa, R Bernet, PJ Clark, DR Lavin, F Muheim, S Playfer, AI Robertson, JE Swain, JE Watson, Y Xie, D Andreotti, M Andreotti, D Bettoni, C Bozzi, R Calabrese, V Carassiti, A Cecchi, G Cibinetto, A Cotta Ramusino, F Evangelisti, E Fioravanti, P Franchini, I Garzia, L Landi, E Luppi, R Malaguti, M Negrini, C Padoan, A Petrella, L Piemontese, V Santoro, A Sarti, F Anulli, R Baldini-Ferroli, A Calcaterra, G Finocchiaro, S Pacetti, P Patteri, IM Peruzzi, M Piccolo, M Rama, R de Sangro, M Santoni, A Zallo, S Bagnasco, A Buzzo, R Capra, R Contri, G Crosetti, M Lo Vetere, MM Macri, S Minutoli, MR Monge, P Musico, S Passaggio, FC Pastore, C Patrignani, MG Pia, E Robutti, A Santroni, S Tosi, B Bhuyan, V Prasad, S Bailey, G Brandenburg, KS Chaisanguanthum, CL Lee, M Morii, E Won, J Wu, A Adametz, RS Dubitzky, J Marks, S Schenk, U Uwer, V Klose, HM Lacker, ML Aspinwall, W Bhimji, DA Bowerman, PD Dauncey, U Egede, RL Flack, JR Gaillard, NJW Gunawardane, GW Morton, JA Nash, MB Nikolich, W Panduro Vazquez, P Sanders, D Smith, GP Taylor, M Tibbetts, PK Behera, X Chai, MJ Charles, GJ Grenier, R Hamilton, S-J Lee, U Mallik, NT Meyer, C Chen, J Cochran, HB Crawley, L Dong, V Eyges, P-A Fischer, J Lamsa, WT Meyer, S Prell, EI Rosenberg, AE Rubin, YY Gao, AV Gritsan, ZJ Guo, CK Lae, G Schott, JN Albert, N Arnaud, C Beigbeder, D Breton, M Davier, D Derkach, S Dû, J Firmino da Costa, G Grosdidier, A Höcker, S Laplace, F Le Diberder, V Lepeltier, AM Lutz, B Malaescu, JY Nief, TC Petersen, S Plaszczynski, S Pruvot, P Roudeau, MH Schune, J Serrano, V Sordini, A Stocchi, V Tocut, S Trincaz-Duvoid, LL Wang, G Wormser, RM Bionta, V Brigljević, DJ Lange, MC Simani, DM Wright, I Bingham, JP Burke, CA Chavez, JP Coleman, IJ Forster, JR Fry, E Gabathuler, R Gamet, M George, DE Hutchcroft, M Kay, RJ Parry, DJ Payne, KC Schofield, RJ Sloane, C Touramanis, DE Azzopardi, G Bellodi, AJ Bevan, CK Clarke, CM Cormack, F Di Lodovico, P Dixon, KA George, W Menges, RJL Potter, R Sacco, HW Shorthouse, M Sigamani, P Strother, PB Vidal, CL Brown, G Cowan, HU Flaecher, S George, MG Green, DA Hopkins, PS Jackson, A Kurup, CE Marker, P McGrath, TR McMahon, S Paramesvaran, F Salvatore, G Vaitsas, MA Winter, AC Wren, DN Brown, CL Davis, AG Denig, M Fritsch, W Gradl, K Griessinger, A Hafner, E Prencipe, J Allison, KE Alwyn, DS Bailey, NR Barlow, RJ Barlow, YM Chia, CL Edgar, AC Forti, J Fullwood, PA Hart, MC Hodgkinson, F Jackson, G Jackson, MP Kelly, SD Kolya, GD Lafferty, AJ Lyon, MT Naisbit, N Savvas, JH Weatherall, TJ West, JC Williams, JI Yi, J Anderson, A Farbin, WD Hulsbergen, A Jawahery, V Lillard, DA Roberts, JR Schieck, G Simi, JM Tuggle, G Blaylock, C Dallapiccola, SS Hertzbach, R Kofler, VB Koptchev, X Li, TB Moore, E Salvati, S Saremi, H Staengle, SY Willocq, R Cowan, D Dujmic, PH Fisher, SW Henderson, K Koeneke, MI Lang, G Sciolla, M Spitznagel, F Taylor, RK Yamamoto, M Yi, M Zhao, Y Zheng, M Klemetti, D Lindemann, DJJ Mangeol, SE Mclachlin, M Milek, PM Patel, SH Robertson, P Biassoni, G Cerizza, A Lazzaro, V Lombardo, N Neri, F Palombo, R Pellegrini, S Stracka, JM Bauer, L Cremaldi, V Eschenburg, R Kroeger, J Reidy, DA Sanders, DJ Summers, HW Zhao, R Godang, S Brunet, D Cote, X Nguyen, M Simard, P Taras, B Viaud, H Nicholson, N Cavallo, G De Nardo, F Fabozzi, C Gatto, L Lista, D Monorchio, G Onorato, P Paolucci, D Piccolo, C Sciacca, MA Baak, G Raven, HL Snoek, CP Jessop, KJ Knoepfel, JM LoSecco, WF Wang, T Allmendinger, G Benelli, B Brau, LA Corwin, KK Gan, K Honscheid, D Hufnagel, H Kagan, R Kass, JP Morris, AM Rahimi, JJ Regensburger, DS Smith, R Ter-Antonyan, QK Wong, NL Blount, J Brau, R Frey, O Igonkina, M Iwasaki, JA Kolb, M Lu, CT Potter, R Rahmat, NB Sinev, D Strom, J Strube, E Torrence, E Borsato, G Castelli, F Colecchia, A Crescente, F Dal Corso, A Dorigo, C Fanin, F Furano, N Gagliardi, F Galeazzi, M Margoni, M Marzolla, G Michelon, M Morandin, M Posocco, M Rotondo, F Simonetto, P Solagna, E Stevanato, R Stroili, G Tiozzo, C Voci, S Akar, P Bailly, E Ben-Haim, G Bonneaud, H Briand, J Chauveau, O Hamon, MJJ John, H Lebbolo, Ph Leruste, J Malclès, G Marchiori, L Martin, J Ocariz, A Perez, M Pivk, J Prendki, L Roos, S Sitt, J Stark, G Thérin, A Vallereau, M Biasini, R Covarelli, E Manoni, S Pennazzi, M Pioppi, C Angelini, G Batignani, S Bettarini, F Bosi, F Bucci, G Calderini, M Carpinelli, R Cenci, A Cervelli, F Forti, MA Giorgi, A Lusiani, G Marchiori, M Morganti, F Morsani, E Paoloni, F Raffaelli, G Rizzo, F Sandrelli, G Triggiani, JJ Walsh, M Haire, D Judd, J Biesiada, N Danielson, P Elmer, RE Fernholz, YP Lau, C Lu, V Miftakov, J Olsen, D Lopes Pegna, WR Sands, AJS Smith, AV Telnov, A Tumanov, EW Varnes, E Baracchini, F Bellini, C Bulfon, E Buccheri, G Cavoto, A D'Orazio, E Di Marco, R Faccini, F Ferrarotto, F Ferroni, M Gaspero, PD Jackson, E Lamanna, E Leonardi, L Li Gioi, R Lunadei, MA Mazzoni, S Morganti, G Piredda, F Polci, D del Re, F Renga, F Safai Tehrani, M Serra, C Voena, C Bünger, S Christ, T Hartmann, T Leddig, H Schröder, G Wagner, R Waldi, T Adye, M Bly, C Brew, C Condurache, N De Groot, B Franek, NI Geddes, GP Gopal, EO Olaiya, S Ricciardi, W Roethel, FF Wilson, SM Xella, R Aleksan, P Bourgeois, S Emery, M Escalier, L Esteve, A Gaidot, SF Ganzhur, P-F Giraud, Z Georgette, G Graziani, G Hamel de Monchenault, W Kozanecki, M Langer, M Legendre, GW London, B Mayer, P Micout, B Serfass, G Vasseur, Ch Yèche, M Zito, MT Allen, R Akre, D Aston, T Azemoon, DJ Bard, J Bartelt, R Bartoldus, P Bechtle, J Becla, JF Benitez, N Berger, K Bertsche, CT Boeheim, K Bouldin, AM Boyarski, RF Boyce, M Browne, OL Buchmueller, W Burgess, Y Cai, C Cartaro, A Ceseracciu, R Claus, MR Convery, DP Coupal, WW Craddock, G Crane, M Cristinziani, S DeBarger, FJ Decker, JC Dingfelder, M Donald, J Dorfan, GP Dubois-Felsmann, W Dunwoodie, M Ebert, S Ecklund, R Erickson, S Fan, RC Field, A Fisher, J Fox, M Franco Sevilla, BG Fulsom, AM Gabareen, I Gaponenko, T Glanzman, SJ Gowdy, MT Graham, P Grenier, T Hadig, V Halyo, G Haller, J Hamilton, A Hanushevsky, A Hasan, C Hast, C Hee, T Himel, T Hryn'ova, ME Huffer, T Hung, WR Innes, R Iverson, J Kaminski, MH Kelsey, H Kim, P Kim, D Kharakh, ML Kocian, A Krasnykh, J Krebs, W Kroeger, A Kulikov, N Kurita, U Langenegger, DWGS Leith, P Lewis, S Li, J Libby, B Lindquist, S Luitz, V Lüth, HL Lynch, DB MacFarlane, H Marsiske, M McCulloch, J McDonald, R Melen, S Menke, S Metcalfe, R Messner, LJ Moss, R Mount, DR Muller, H Neal, D Nelson, S Nelson, M Nordby, Y Nosochkov, A Novokhatski, CP O'Grady, FG O'Neill, I Ofte, VE Ozcan, A Perazzo, M Perl, S Petrak, M Piemontese, S Pierson, T Pulliam, BN Ratcliff, S Ratkovsky, R Reif, C Rivetta, R Rodriguez, A Roodman, AA Salnikov, T Schietinger, RH Schindler, H Schwarz, J Schwiening, J Seeman, D Smith, A Snyder, A Soha, M Stanek, J Stelzer, D Su, MK Sullivan, K Suzuki, SK Swain, HA Tanaka, D Teytelman, JM Thompson, JS Tinslay, A Trunov, J Turner, N van Bakel, D van Winkle, J Va'vra, AP Wagner, M Weaver, AJR Weinstein, T Weber, CA West, U Wienands, WJ Wisniewski, M Wittgen, W Wittmer, DH Wright, HW Wulsin, Y Yan, AK Yarritu, K Yi, G Yocky, CC Young, V Ziegler, XR Chen, H Liu, W Park, MV Purohit, H Singh, AW Weidemann, RM White, JR Wilson, FX Yumiceva, SJ Sekula, M Bellis, PR Burchat, AJ Edwards, SA Majewski, TI Meyer, TS Miyashita, BA Petersen, C Roat, M Ahmed, S Ahmed, MS Alam, R Bula, JA Ernst, V Jain, J Liu, B Pan, MA Saeed, FR Wappler, SB Zain, R Gorodeisky, N Guttman, D Peimer, A Soffer, A De Silva, P Lund, M Krishnamurthy, G Ragghianti, SM Spanier, BJ Wogsland, R Eckmann, JL Ritchie, AM Ruland, A Satpathy, CJ Schilling, RF Schwitters, BC Wray, BW Drummond, JM Izen, I Kitayama, XC Lou, S Ye, F Bianchi, M Bona, F Gallo, D Gamba, M Pelliccioni, M Bomben, C Borean, L Bosisio, F Cossutti, G Della Ricca, S Dittongo, S Grancagnolo, L Lanceri, P Poropat, I Rashevskaya, L Vitale, G Vuagnin, PF Manfredi, V Re, V Speziali, ED Frank, L Gladney, QH Guo, J Panetta, V Azzolini, N Lopez-March, F Martinez-Vidal, DA Milanes, A Oyanguren, A Agarwal, J Albert, Sw Banerjee, FU Bernlochner, CM Brown, HHF Choi, D Fortin, KB Fransham, K Hamano, R Kowalewski, MJ Lewczuk, IM Nugent, JM Roney, RJ Sobie, JJ Back, TJ Gershon, PF Harrison, J Ilic, TE Latham, GB Mohanty, E Puccio, HR Band, X Chen, B Cheng, S Dasu, M Datta, AM Eichenbaum, JJ Hollar, H Hu, JR Johnson, PE Kutter, H Li, R Liu, B Mellado, A Mihalyi, AK Mohapatra, Y Pan, M Pierini, R Prepost, IJ Scott, P Tan, CO Vuosalo, JH von Wimmersperg-Toeller, SL Wu, Z Yu, MG Greene, TMB Kordich

Study of forward Z+jet production in pp collisions at $\sqrt{s} = 7$ TeV

(2013)

Authors:

LHCb collaboration, R Aaij, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves, S Amato, S Amerio, Y Amhis, 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, V Balagura, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, Th Bauer, A Bay, 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, TJV Bowcock, E Bowen, C Bozzi, T Brambach, J van den Brand, J Bressieux, D Brett, M Britsch, T Britton, NH Brook, H Brown, A Bursche, G Busetto, J Buytaert, S Cadeddu, R Calabrese, O Callot, M Calvi, M Calvo Gomez, A Camboni, P Campana, D Campora Perez, A Carbone, G Carboni, R Cardinale, A Cardini, H Carranza-Mejia, L Carson, K Carvalho Akiba, G Casse, L Castillo Garcia, M Cattaneo, Ch Cauet, R Cenci, M Charles, Ph Charpentier, S-F Cheung, N Chiapolini, M Chrzaszcz, K Ciba, X Cid Vidal, G Ciezarek, PEL Clarke, M Clemencic, HV Cliff, J Closier, C Coca, V Coco, J Cogan, E Cogneras, P Collins, A Comerma-Montells, A Contu, A Cook, M Coombes, S Coquereau, G Corti, B Couturier, GA Cowan, DC Craik, M Cruz Torres, S Cunliffe, R Currie, C D'Ambrosio, J Dalseno, P David, PNY David, A Davis, I De Bonis, 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, M Dogaru, S Donleavy, F Dordei, A Dosil Suárez, D Dossett, A Dovbnya, F Dupertuis, P Durante, R Dzhelyadin, A Dziurda, A Dzyuba, S Easo, U Egede, V Egorychev, S Eidelman, D van Eijk, S Eisenhardt, U Eitschberger, R Ekelhof, L Eklund, I El Rifai, Ch Elsasser, A Falabella, C Färber, C Farinelli, S Farry, D Ferguson, V Fernandez Albor, F Ferreira Rodrigues, M Ferro-Luzzi, S Filippov, M Fiore, M Fiorini, C Fitzpatrick, M Fontana, F Fontanelli, R Forty, O Francisco, M Frank, C Frei, M Frosini, E Furfaro, A Gallas Torreira, D Galli, M Gandelman, P Gandini, Y Gao, J Garofoli, P Garosi, J Garra Tico, L Garrido, C Gaspar, R Gauld, E Gersabeck, M Gersabeck, T Gershon, Ph Ghez, V Gibson, L Giubega, VV Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, P Gorbounov, H Gordon, 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, TW Hafkenscheid, SC Haines, S Hall, B Hamilton, T Hampson, S Hansmann-Menzemer, N Harnew, ST Harnew, J Harrison, T Hartmann, J He, T Head, V Heijne, K Hennessy, P Henrard, JA Hernando Morata, E van Herwijnen, M Heß, A Hicheur, E Hicks, D Hill, M Hoballah, C Hombach, W Hulsbergen, P Hunt, T Huse, N Hussain, D Hutchcroft, D Hynds, V Iakovenko, M Idzik, P Ilten, R Jacobsson, A Jaeger, E Jans, P Jaton, A Jawahery, F Jing, M John, D Johnson, CR Jones, C Joram, B Jost, M Kaballo, S Kandybei, W Kanso, M Karacson, TM Karbach, IR Kenyon, T Ketel, B Khanji, S Klaver, O Kochebina, I Komarov, RF Koopman, P Koppenburg, M Korolev, A Kozlinskiy, L Kravchuk, K Kreplin, M Kreps, G Krocker, P Krokovny, F Kruse, M Kucharczyk, V Kudryavtsev, K Kurek, T Kvaratskheliya, VN La Thi, D Lacarrere, G Lafferty, A Lai, D Lambert, RW Lambert, E Lanciotti, G Lanfranchi, C Langenbruch, 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, L Li Gioi, M Liles, R Lindner, C Linn, B Liu, G Liu, S Lohn, I Longstaff, JH Lopes, N Lopez-March, H Lu, D Lucchesi, J Luisier, H Luo, E Luppi, O Lupton, F Machefert, IV Machikhiliyan, F Maciuc, O Maev, S Malde, G Manca, G Mancinelli, J Maratas, U Marconi, P Marino, R Märki, J Marks, G Martellotti, A Martens, A Martín Sánchez, M Martinelli, D Martinez Santos, D Martins Tostes, A Martynov, A Massafferri, R Matev, Z Mathe, C Matteuzzi, E Maurice, 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, J Molina Rodriguez, S Monteil, D Moran, P Morawski, A Mordà, MJ Morello, R Mountain, I Mous, F Muheim, K Müller, R Muresan, B Muryn, B Muster, P Naik, T Nakada, R Nandakumar, I Nasteva, M Needham, S Neubert, N Neufeld, AD Nguyen, TD Nguyen, C Nguyen-Mau, M Nicol, V Niess, R Niet, N Nikitin, T Nikodem, A Nomerotski, A Novoselov, 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, M Palutan, J Panman, A Papanestis, M Pappagallo, C Parkes, CJ Parkinson, G Passaleva, GD Patel, M Patel, C Patrignani, C Pavel-Nicorescu, A Pazos Alvarez, A Pearce, A Pellegrino, G Penso, M Pepe Altarelli, S Perazzini, E Perez Trigo, A Pérez-Calero Yzquierdo, P Perret, M Perrin-Terrin, L Pescatore, E Pesen, G Pessina, K Petridis, A Petrolini, E Picatoste Olloqui, B Pietrzyk, T Pilař, D Pinci, S Playfer, M Plo Casasus, F Polci, G Polok, A Poluektov, E Polycarpo, A Popov, D Popov, B Popovici, C Potterat, A Powell, J Prisciandaro, A Pritchard, C Prouve, V Pugatch, A Puig Navarro, G Punzi, W Qian, B Rachwal, JH Rademacker, B Rakotomiaramanana, MS Rangel, I Raniuk, N Rauschmayr, G Raven, S Redford, S Reichert, MM Reid, AC dos Reis, S Ricciardi, A Richards, K Rinnert, V Rives Molina, DA Roa Romero, P Robbe, DA Roberts, 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, G Sabatino, JJ Saborido Silva, N Sagidova, P Sail, B Saitta, V Salustino Guimaraes, B Sanmartin Sedes, R Santacesaria, C Santamarina Rios, E Santovetti, M Sapunov, A Sarti, C Satriano, A Satta, 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, K Senderowska, I Sepp, N Serra, J Serrano, P Seyfert, M Shapkin, I Shapoval, Y Shcheglov, T Shears, L Shekhtman, O Shevchenko, V Shevchenko, A Shires, R Silva Coutinho, M Sirendi, N Skidmore, T Skwarnicki, NA Smith, E Smith, E Smith, J Smith, M Smith, MD Sokoloff, FJP Soler, F Soomro, D Souza, B Souza De Paula, B Spaan, A Sparkes, P Spradlin, F Stagni, S Stahl, O Steinkamp, S Stevenson, S Stoica, S Stone, B Storaci, S Stracka, M Straticiuc, U Straumann, VK Subbiah, L Sun, W Sutcliffe, S Swientek, V Syropoulos, M Szczekowski, P Szczypka, D Szilard, T Szumlak, S T'Jampens, M Teklishyn, G Tellarini, E Teodorescu, 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, X Vilasis-Cardona, A Vollhardt, D Volyanskyy, D Voong, A Vorobyev, V Vorobyev, C Voß, H Voss, R Waldi, C Wallace, R Wallace, S Wandernoth, J Wang, DR Ward, NK Watson, AD Webber, D Websdale, M Whitehead, J Wicht, J Wiechczynski, D Wiedner, L Wiggers, 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 Yang, X Yuan, O Yushchenko, M Zangoli, M Zavertyaev, F Zhang, L Zhang, WC Zhang, Y Zhang, A Zhelezov, A Zhokhov, L Zhong, A Zvyagin

Study of forward Z+jet production in pp collisions at $\sqrt{s} = 7$ TeV

ArXiv 1310.8197 (2013)

Authors:

LHCb collaboration, R Aaij, B Adeva, M Adinolfi, C Adrover, A Affolder, Z Ajaltouni, J Albrecht, F Alessio, M Alexander, S Ali, G Alkhazov, P Alvarez Cartelle, AA Alves Jr, S Amato, S Amerio, Y Amhis, 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, V Balagura, W Baldini, RJ Barlow, C Barschel, S Barsuk, W Barter, V Batozskaya, Th Bauer, A Bay, 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, TJV Bowcock, E Bowen, C Bozzi, T Brambach, J van den Brand, J Bressieux, D Brett, M Britsch, T Britton, NH Brook, H Brown, A Bursche, G Busetto, J Buytaert, S Cadeddu, R Calabrese, O Callot, M Calvi, M Calvo Gomez, A Camboni, P Campana, D Campora Perez, A Carbone, G Carboni, R Cardinale, A Cardini, H Carranza-Mejia, L Carson, K Carvalho Akiba, G Casse, L Castillo Garcia, M Cattaneo, Ch Cauet, R Cenci, M Charles, Ph Charpentier, S-F Cheung, N Chiapolini, M Chrzaszcz, K Ciba, X Cid Vidal, G Ciezarek, PEL Clarke, M Clemencic, HV Cliff, J Closier, C Coca, V Coco, J Cogan, E Cogneras, P Collins, A Comerma-Montells, A Contu, A Cook, M Coombes, S Coquereau, G Corti, B Couturier, GA Cowan, DC Craik, M Cruz Torres, S Cunliffe, R Currie, C D'Ambrosio, J Dalseno, P David, PNY David, A Davis, I De Bonis, 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, M Dogaru, S Donleavy, F Dordei, A Dosil Suárez, D Dossett, A Dovbnya, F Dupertuis, P Durante, R Dzhelyadin, A Dziurda, A Dzyuba, S Easo, U Egede, V Egorychev, S Eidelman, D van Eijk, S Eisenhardt, U Eitschberger, R Ekelhof, L Eklund, I El Rifai, Ch Elsasser, A Falabella, C Färber, C Farinelli, S Farry, D Ferguson, V Fernandez Albor, F Ferreira Rodrigues, M Ferro-Luzzi, S Filippov, M Fiore, M Fiorini, C Fitzpatrick, M Fontana, F Fontanelli, R Forty, O Francisco, M Frank, C Frei, M Frosini, E Furfaro, A Gallas Torreira, D Galli, M Gandelman, P Gandini, Y Gao, J Garofoli, P Garosi, J Garra Tico, L Garrido, C Gaspar, R Gauld, E Gersabeck, M Gersabeck, T Gershon, Ph Ghez, V Gibson, L Giubega, VV Gligorov, C Göbel, D Golubkov, A Golutvin, A Gomes, P Gorbounov, H Gordon, 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, TW Hafkenscheid, SC Haines, S Hall, B Hamilton, T Hampson, S Hansmann-Menzemer, N Harnew, ST Harnew, J Harrison, T Hartmann, J He, T Head, V Heijne, K Hennessy, P Henrard, JA Hernando Morata, E van Herwijnen, M Heß, A Hicheur, E Hicks, D Hill, M Hoballah, C Hombach, W Hulsbergen, P Hunt, T Huse, N Hussain, D Hutchcroft, D Hynds, V Iakovenko, M Idzik, P Ilten, R Jacobsson, A Jaeger, E Jans, P Jaton, A Jawahery, F Jing, M John, D Johnson, CR Jones, C Joram, B Jost, M Kaballo, S Kandybei, W Kanso, M Karacson, TM Karbach, IR Kenyon, T Ketel, B Khanji, S Klaver, O Kochebina, I Komarov, RF Koopman, P Koppenburg, M Korolev, A Kozlinskiy, L Kravchuk, K Kreplin, M Kreps, G Krocker, P Krokovny, F Kruse, M Kucharczyk, V Kudryavtsev, K Kurek, T Kvaratskheliya, VN La Thi, D Lacarrere, G Lafferty, A Lai, D Lambert, RW Lambert, E Lanciotti, G Lanfranchi, C Langenbruch, 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, L Li Gioi, M Liles, R Lindner, C Linn, B Liu, G Liu, S Lohn, I Longstaff, JH Lopes, N Lopez-March, H Lu, D Lucchesi, J Luisier, H Luo, E Luppi, O Lupton, F Machefert, IV Machikhiliyan, F Maciuc, O Maev, S Malde, G Manca, G Mancinelli, J Maratas, U Marconi, P Marino, R Märki, J Marks, G Martellotti, A Martens, A Martín Sánchez, M Martinelli, D Martinez Santos, D Martins Tostes, A Martynov, A Massafferri, R Matev, Z Mathe, C Matteuzzi, E Maurice, 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, J Molina Rodriguez, S Monteil, D Moran, P Morawski, A Mordà, MJ Morello, R Mountain, I Mous, F Muheim, K Müller, R Muresan, B Muryn, B Muster, P Naik, T Nakada, R Nandakumar, I Nasteva, M Needham, S Neubert, N Neufeld, AD Nguyen, TD Nguyen, C Nguyen-Mau, M Nicol, V Niess, R Niet, N Nikitin, T Nikodem, A Nomerotski, A Novoselov, 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, M Palutan, J Panman, A Papanestis, M Pappagallo, C Parkes, CJ Parkinson, G Passaleva, GD Patel, M Patel, C Patrignani, C Pavel-Nicorescu, A Pazos Alvarez, A Pearce, A Pellegrino, G Penso, M Pepe Altarelli, S Perazzini, E Perez Trigo, A Pérez-Calero Yzquierdo, P Perret, M Perrin-Terrin, L Pescatore, E Pesen, G Pessina, K Petridis, A Petrolini, E Picatoste Olloqui, B Pietrzyk, T Pilař, D Pinci, S Playfer, M Plo Casasus, F Polci, G Polok, A Poluektov, E Polycarpo, A Popov, D Popov, B Popovici, C Potterat, A Powell, J Prisciandaro, A Pritchard, C Prouve, V Pugatch, A Puig Navarro, G Punzi, W Qian, B Rachwal, JH Rademacker, B Rakotomiaramanana, MS Rangel, I Raniuk, N Rauschmayr, G Raven, S Redford, S Reichert, MM Reid, AC dos Reis, S Ricciardi, A Richards, K Rinnert, V Rives Molina, DA Roa Romero, P Robbe, DA Roberts, 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, G Sabatino, JJ Saborido Silva, N Sagidova, P Sail, B Saitta, V Salustino Guimaraes, B Sanmartin Sedes, R Santacesaria, C Santamarina Rios, E Santovetti, M Sapunov, A Sarti, C Satriano, A Satta, 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, K Senderowska, I Sepp, N Serra, J Serrano, P Seyfert, M Shapkin, I Shapoval, Y Shcheglov, T Shears, L Shekhtman, O Shevchenko, V Shevchenko, A Shires, R Silva Coutinho, M Sirendi, N Skidmore, T Skwarnicki, NA Smith, E Smith, E Smith, J Smith, M Smith, MD Sokoloff, FJP Soler, F Soomro, D Souza, B Souza De Paula, B Spaan, A Sparkes, P Spradlin, F Stagni, S Stahl, O Steinkamp, S Stevenson, S Stoica, S Stone, B Storaci, S Stracka, M Straticiuc, U Straumann, VK Subbiah, L Sun, W Sutcliffe, S Swientek, V Syropoulos, M Szczekowski, P Szczypka, D Szilard, T Szumlak, S T'Jampens, M Teklishyn, G Tellarini, E Teodorescu, 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, X Vilasis-Cardona, A Vollhardt, D Volyanskyy, D Voong, A Vorobyev, V Vorobyev, C Voß, H Voss, R Waldi, C Wallace, R Wallace, S Wandernoth, J Wang, DR Ward, NK Watson, AD Webber, D Websdale, M Whitehead, J Wicht, J Wiechczynski, D Wiedner, L Wiggers, 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 Yang, X Yuan, O Yushchenko, M Zangoli, M Zavertyaev, F Zhang, L Zhang, WC Zhang, Y Zhang, A Zhelezov, A Zhokhov, L Zhong, A Zvyagin

Abstract:

A measurement of the $Z(\rightarrow\mu^+\mu^-)$+jet production cross-section in $pp$ collisions at a centre-of-mass energy $\sqrt{s} = 7$ TeV is presented. The analysis is based on an integrated luminosity of $1.0\,\text{fb}^{-1}$ recorded by the LHCb experiment. Results are shown with two jet transverse momentum thresholds, 10 and 20 GeV, for both the overall cross-section within the fiducial volume, and for six differential cross-section measurements. The fiducial volume requires that both the jet and the muons from the Z boson decay are produced in the forward direction ($2.0<\eta<4.5$). The results show good agreement with theoretical predictions at the second-order expansion in the coupling of the strong interaction.