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1. First observation of Bs -> D_{s2}^{*+} X mu nu decays

Author

Collaboration, L, Aaij, R, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Agari, M, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Cartelle, PA, Jr, AAA, Amato, S, Amhis, Y, Amoraal, J, Anderson, J, Nobrega, RA, Appleby, RB, Gutierrez, OA, Arefyev, A, Arrabito, L, Artuso, M, Aslanides, E, Auriemma, G, Bachmann, S, Bailey, DS, Balagura, V, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Basiladze, S, Bates, A, Bauer, C, Bauer, T, Bay, A, Bediaga, I, Belous, K, Belyaev, I, Benayoun, M, Bencivenni, G, Bernet, R, Bettler, MO, Beuzekom, MV, Bifani, S, Bizzeti, A, ornstad, PMB, Blake, T, Blanc, F, Blanks, C, Blouw, J, Blusk, S, Bobrov, A, Bocci, V, Bochin, B, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borgia, A, Bos, E, Bowcock, TJV, Bozzi, C, Brambach, T, Brand, JVD, Bressieux, J, Brisbane, S, Britsch, M, Britton, T, Brook, NH, Brown, H, Büchler-Germann, A, Bursche, A, Buytaert, J, Cadeddu, S, Carvajal, JMC, Callot, O, Calvi, M, Gomez, MC, Camboni, A, Cameron, W, Camilleri, L, Campana, P, Carbone, A, Carboni, G, Cardinale, R, Cardini, A, Carson, L, Akiba, KC, Casse, G, Cattaneo, M, Charles, M, Charpentier, P, Cheng, J, Chiapolini, N, Chlopik, A, Christiansen, J, Ciambrone, P, Vidal, XC, Clark, PJ, Clarke, PEL, Clemencic, M, Cliff, HV, Closier, J, Coca, C, Coco, V, Cogan, J, Collins, P, Constantin, F, Conti, G, Contu, A, Coombes, M, Corti, G, Cowan, GA, Currie, R, D'Almagne, B, D'Ambrosio, C, D'Antone, I, Silva, WD, Dane', E, David, P, Bonis, ID, Capua, SD, Cian, MD, Lorenzi, FD, Miranda, JMD, Paula, LD, Simone, PD, Decamp, D, Degaudenzi, H, Deissenroth, M, Buono, LD, Deplano, C, Deschamps, O, Dettori, F, Dickens, J, Dijkstra, H, Dima, M, Donleavy, S, Dornan, P, Dossett, D, Dovbnya, A, Dupertuis, F, Dzhelyadin, R, Eames, C, Easo, S, Egede, U, Egorychev, V, Eidelman, S, Eijk, DV, Eisele, F, Eisenhardt, S, Eklund, L, d'Enterria, DG, Pereira, DE, Estève, L, Fanchini, E, Färber, C, Fardell, G, Farinelli, C, Farry, S, Fave, V, Albor, VF, Ferro-Luzzi, M, Filippov, S, Fitzpatrick, C, Flegel, W, Fontanelli, F, Forty, R, Frank, M, Frei, C, Frosini, M, Pazos, JLF, Furcas, S, Torreira, AG, Galli, D, Gandelman, M, Gandini, P, Gao, Y, Garnier, JC, Garofoli, J, Garrido, L, Gaspar, C, Gassner, J, Gauvin, N, Gavillet, P, Gersabeck, M, Gershon, T, Ghez, P, Gibson, V, Gligorov, VV, Göbel, C, Golubkov, D, Golutvin, A, Gomes, A, Gong, G, Gong, H, Gordon, H, Gándara, MG, Diaz, RG, Cardoso, LAG, Graugés, E, Graziani, G, Grecu, A, Gregson, S, Gui, B, Gushchin, E, Guz, Y, Guzik, Z, Gys, T, Haefeli, G, Haines, SC, Hampson, T, Hansmann-Menzemer, S, Harji, R, Harnew, N, Harrison, PF, He, J, Hennessy, K, Henrard, P, Morata, JAH, Herwijnen, EV, Hicheur, A, Hicks, E, Hilke, HJ, Hofmann, W, Holubyev, K, Hopchev, P, Hulsbergen, W, Hunt, P, Huse, T, Huston, RS, Hutchcroft, D, Iakovenko, V, Escudero, CI, Ilgner, C, Ilten, P, Imong, J, Jacobsson, R, Hussein, MJ, Jans, E, Jansen, F, Jaton, P, Jean-Marie, B, Jing, F, John, M, Johnson, D, Jones, CR, Jost, B, Kapusta, F, Karbach, TM, Kashchuk, A, Keaveney, J, Kerzel, U, Ketel, T, Keune, A, Khanji, B, Kim, YM, Knecht, M, Koblitz, S, Konoplyannikov, A, Koppenburg, P, Korolev, M, Kozlinskiy, A, Kravchuk, L, Krocker, G, Krokovny, P, Kruse, F, Kruzelecki, K, Kucharczyk, M, Kukulak, S, Kumar, R, Kvaratskheliya, T, Thi, VNL, Lacarrere, D, Lafferty, G, Lai, A, Lambert, RW, Lanfranchi, G, Langenbruch, C, Latham, T, Gac, RL, Leerdam, JV, Lees, JP, Lefèvre, R, Leflat, A, ccois, JL, Lehner, F, Leroy, O, Lesiak, T, Li, L, Li, YY, Gioi, LL, Libby, J, Lieng, M, Liles, M, Lindner, R, Linn, C, Liu, B, Liu, G, Löchner, S, Lopes, JH, Asamar, EL, Lopez-March, N, Luisier, J, M'charek, B, Machefert, F, Machikhiliyan, IV, Maciuc, F, Maev, O, Magnin, J, Maier, A, Malde, S, Mamunur, RMD, Manca, G, Mancinelli, G, Mangiafave, N, Marconi, U, Märki, R, Marks, J, Martellotti, G, Martens, A, Martin, L, Sanchez, AM, Santos, DM, Massafferri, A, Mathe, Z, Matteuzzi, C, Matveev, M, Matveev, V, Maurice, E, Maynard, B, Mazurov, A, McGregor, G, McNulty, R, Mclean, C, Meissner, M, Merk, M, Merkel, J, Merkin, M, Messi, R, Miglioranzi, S, Milanes, DA, Minard, MN, Monteil, S, Moran, D, Morawski, P, Morris, JV, Moscicki, J, Mountain, R, Mous, I, Muheim, F, Müller, K, Muresan, R, Murtas, F, Muryn, B, Musy, M, Mylroie-Smith, J, Naik, P, Nakada, T, Nandakumar, R, Nardulli, J, Nawrot, A, Nedos, M, Needham, M, Neufeld, N, Neustroev, P, Nicol, M, Nies, S, Niess, V, Nikitin, N, Oblakowska-Mucha, A, Obraztsov, V, Oggero, S, Okhrimenko, O, Oldeman, R, Orlandea, M, Ostankov, A, Pal, B, Palacios, J, Palutan, M, Panman, J, Papanestis, A, Pappagallo, M, Parkes, C, Parkinson, CJ, Passaleva, G, Patel, GD, Patel, M, Paterson, SK, Patrick, GN, Patrignani, C, Pauna, E, Pauna, C, Pavel, C, Alvarez, AP, Pellegrino, A, Penso, G, Altarelli, MP, Perazzini, S, Perego, DL, Trigo, EP, Yzquierdo, APC, Perret, P, Pessina, G, Petrella, A, Petrolini, A, Valls, BP, Pietrzyk, B, Pinci, D, Plackett, R, Playfer, S, Casasus, MP, Polok, G, Poluektov, A, Polycarpo, E, Popov, D, Popovici, B, Potterat, C, Powell, A, Pozzi, S, Pree, TD, Pugatch, V, Navarro, AP, Qian, W, Rademacker, JH, Rakotomiaramanana, B, Raniuk, I, Raven, G, Redford, S, Reece, W, Reis, ACD, Ricciardi, S, Rinnert, K, Romero, DAR, Robbe, P, Rodrigues, E, Rodrigues, F, Cobo, CR, Perez, PR, Rogers, GJ, Romanovsky, V, Rouvinet, J, Ruf, T, Ruiz, H, Rusinov, V, Sabatino, G, Silva, JJS, Sagidova, N, Sail, P, Saitta, B, Salzmann, C, Varela, AS, Sannino, M, Santacesaria, R, Santinelli, R, Santovetti, E, Sapunov, M, Saputi, A, Sarti, A, Satriano, C, Satta, A, Savrie, M, Savrina, D, Schaack, P, Schiller, M, Schleich, S, Schmelling, M, Schmidt, B, Schneider, O, Schneider, T, Schopper, A, Schune, MH, Schwemmer, R, Sciubba, A, Seco, M, Semennikov, A, Senderowska, K, Serra, N, Serrano, J, Shao, B, Shapkin, M, Shapoval, I, Shatalov, P, Shcheglov, Y, Shears, T, Shekhtman, L, Shevchenko, O, Shevchenko, V, Shires, A, Simioni, E, Skottowe, HP, Skwarnicki, T, Smale, N, Smith, A, Smith, AC, Sobczak, K, Soler, FJP, Solomin, A, Somogy, P, Soomro, F, Paula, BSD, Spaan, B, Sparkes, A, Spiridenkov, E, Spradlin, P, Srednicki, A, Stagni, F, Steiner, S, Steinkamp, O, Stenyakin, O, Stoica, S, Stone, S, Storaci, B, Straumann, U, Styles, N, Szczekowski, M, Szczypka, P, Szumlak, T, T'Jampens, S, Talanov, V, Tarkovskiy, E, Teodorescu, E, Terrier, H, Teubert, F, Thomas, C, Thomas, E, Tilburg, JV, Tisserand, V, Tobin, M, Topp-Joergensen, S, Tran, MT, Traynor, S, Trunk, U, Tsaregorodtsev, A, Tuning, N, Ukleja, A, Urquijo, P, Uwer, U, Vagnoni, V, Valenti, G, Gomez, RV, Regueiro, PV, Vecchi, S, Velthuis, JJ, Veltri, M, Vervink, K, Viaud, B, Videau, I, Vilasis-Cardona, X, Visniakov, J, Vollhardt, A, Voong, D, Vorobyev, A, Voss, H, Wacker, K, Wandernoth, S, Wang, J, Ward, DR, Webber, AD, Websdale, D, Whitehead, M, Wiedner, D, Wiggers, L, Wilkinson, G, Williams, MP, Williams, M, Wilson, FF, Wishahi, J, Witek, M, Witzeling, W, Wotton, SA, Wyllie, K, Xie, Y, Xing, F, Yang, Z, Smit, GY, Young, R, Yushchenko, O, Zavertyaev, M, Zeng, M, Zhang, L, Zhang, WC, Zhang, Y, Zhelezov, A, Zhong, L, Zverev, E, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Calcul de l'IN2P3 (CC-IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and LHCb

Subjects
B0s meson, semileptonic b decays, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], LHC, 14.40.Lb, 14.65.Fy, 13.20-He, High Energy Physics - Experiment
Abstract

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays Bs -> Ds+ X mu nu and Bs -> D0 K+ X mu nu are detected. Two structures are observed in the D0 K+ mass spectrum at masses consistent with the known D^+_{s1}(2536) and $D^{*+}_{s2}(2573) mesons. The measured branching fractions relative to the total Bs semileptonic rate are B(Bs -> D_{s2}^{*+} X mu nu)/B(Bs -> X mu nu)= (3.3\pm 1.0\pm 0.4)%, and B(Bs -> D_{s1}^+ X munu)/B(Bs -> X mu nu)= (5.4\pm 1.2\pm 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D_{s2}^{*+} state in Bs decays; we also measure its mass and width., Comment: 8 pages 2 figures. Published in Physics Letters B

Published
2011
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2. Roadmap for selected key measurements of LHCb

Author

Collaboration, TL, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Cartelle, PA, Jr, AAA, Amato, S, Amhis, Y, Amoraal, J, Anderson, J, Gutierrez, OA, Arrabito, L, Artuso, M, Aslanides, E, Auriemma, G, Bachmann, S, Bagaturia, Y, Bailey, DS, Balagura, V, Baldini, W, Pazos, MB, Barlow, RJ, Barsuk, S, Bates, A, Bauer, C, Bauer, T, Bay, A, Bediaga, I, Belous, K, Belyaev, I, Benayoun, M, Bencivenni, G, Bernet, R, Bettler, M-O, Bizzeti, A, Blake, T, Blanc, F, Blanks, C, Blouw, J, Blusk, S, Bobrov, A, Bocci, V, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borgia, A, Bos, E, Bowcock, TJV, Bozzi, C, Bressieux, J, Brisbane, S, Britsch, M, Brook, NH, Brown, H, Büchler-Germann, A, Buytaert, J, Cachemiche, J-P, Cadeddu, S, Carvajal, JMC, Callot, O, Calvi, M, Gomez, MC, Camboni, A, Cameron, W, Campana, P, Carbone, A, Carboni, G, Cardini, A, Carson, L, Akiba, KC, Casse, G, Cattaneo, M, Charles, M, Charpentier, P, Chlopik, A, Ciambrone, P, Vidal, XC, Clark, PJ, Clarke, PEL, Clemencic, M, Cliff, HV, Closier, J, Coca, C, Coco, V, Cogan, J, Collins, P, Constantin, F, Conti, G, Contu, A, Corti, G, Cowan, GA, D'Almagne, B, D'Ambrosio, C, D'Enterria, DG, Silva, WD, David, P, Bonis, ID, Capua, SD, Cian, MD, Lorenzi, FD, Miranda, JMD, Paula, LD, Simone, PD, Vries, HD, Decamp, D, Degaudenzi, H, Deissenroth, M, Buono, LD, Deplano, C, Deschamps, O, Dettori, F, Dickens, J, Dijkstra, H, Dima, M, Donleavy, S, Reis, ACD, Dovbnya, A, Pree, TD, Duval, P-Y, Dwyer, L, Dzhelyadin, R, Eames, C, Easo, S, Egede, U, Egorychev, V, Eisele, F, Eisenhardt, S, Eklund, L, Pereira, DE, Estève, L, Eydelman, S, Fanchini, E, Färber, C, Fardell, G, Farinelli, C, Farry, S, Fave, V, Albor, VF, Ferro-Luzzi, M, Filippov, S, Fitzpatrick, C, Fontanelli, F, Forty, R, Frank, M, Frei, C, Frosini, M, Pazos, JLF, Furcas, S, Torreira, AG, Galli, D, Gandelman, M, Gao, Y, Garnier, J-C, Garrido, L, Gaspar, C, Gauvin, N, Gersabeck, M, Gershon, T, Ghez, P, Gibson, V, Gilitsky, Y, Gligorov, VV, Göbel, C, Golubkov, D, Golutvin, A, Gomes, A, Gándara, MG, Diaz, RG, Cardoso, LAG, Graugés, E, Graziani, G, Grecu, A, Guerrer, G, Gushchin, E, Guz, Y, Guzik, Z, Gys, T, Hachon, F, Haefeli, G, Haines, SC, Hampson, T, Hansmann-Menzemer, S, Harji, R, Harnew, N, Harrison, PF, He, J, Hennessy, K, Henrard, P, Morata, JAH, Hicheur, A, Hicks, E, Hofmann, W, Holubyev, K, Hopchev, P, Hulsbergen, W, Hunt, P, Huse, T, Huston, RS, Hutchcroft, D, Iakovenko, V, Escudero, CI, Imong, J, Jacobsson, R, Hussein, MJ, Jans, E, Jansen, F, Jaton, P, Jean-Marie, B, John, M, Jones, CR, Jost, B, Kapusta, F, Karbach, TM, Keaveney, J, Kerzel, U, Ketel, T, Keune, A, Khalil, S, Khanji, B, Kim, YM, Knecht, M, Knopf, J, Koblitz, S, Konoplyannikov, A, Koppenburg, P, Korolko, I, Kozlinskiy, A, Krasowski, M, Kravchuk, L, Krokovny, P, Kruzelecki, K, Kucharczyk, M, Kudryashov, I, Kvaratskheliya, T, Lacarrere, D, Lai, A, Lambert, RW, Lanfranchi, G, Langenbruch, C, Latham, T, Gac, RL, Lefevre, R, Leflat, A, Lefrançois, J, Leroy, O, Lessnoff, K, Li, L, Li, YY, Libby, J, Lieng, M, Lindner, R, Lindsey, S, Linn, C, Liu, B, Liu, G, Lopes, JH, Asamar, EL, Luisier, J, Machefert, F, Machikhiliyan, I, Maciuc, F, Maev, O, Magnin, J, Maier, A, Mamunur, RMD, Manca, G, Mancinelli, G, Mangiafave, N, Marconi, U, Marin, F, Marks, J, Martellotti, G, Martens, A, Martin, L, Santos, DM, Mathe, Z, Matteuzzi, C, Matveev, V, Mazurov, A, McGregor, G, Mcharek, B, Mclean, C, McNulty, R, Merk, M, Merkel, J, Merkin, M, Messi, R, Metlica, FCD, Michalowski, J, Miglioranzi, S, Minard, M-N, Monteil, S, Moran, D, Morris, JV, Mountain, R, Mous, I, Muheim, F, Muresan, R, Murtas, F, Muryn, B, Musy, M, Mylroie-Smith, J, Naik, P, Nakada, T, Nandakumar, R, Nardulli, J, Natkaniec, Z, Nedos, M, Needham, M, Neufeld, N, Nicolas, L, Nies, S, Niess, V, Nikitin, N, Noor, A, Oblakowska-Mucha, A, Obraztsov, V, Oggero, S, Okhrimenko, O, Oldeman, R, Orlandea, M, Ostankov, A, Palacios, J, Palutan, M, Panman, J, Papadelis, A, Papanestis, A, Pappagallo, M, Parkes, C, Passaleva, G, Patel, GD, Patel, M, Paterson, SK, Patrick, GN, Pauna, E, Pauna, C, Pavel, C, Alvarez, AP, Pellegrino, A, Penso, G, Altarelli, MP, Perazzini, S, Perego, DL, Yzquierdo, AP-C, Trigo, EP, Perret, P, Pessina, G, Petrella, A, Petrolini, A, Pietrzyk, B, Pinci, D, Playfer, S, Casasus, MP, Polok, G, Poluektov, A, Polycarpo, E, Popov, D, Popovici, B, Poss, S, Potterat, C, Powell, A, Pozzi, S, Pugatch, V, Navarro, AP, Qian, W, Rademacker, JH, Rakotomiaramanana, B, Raniuk, I, Raven, G, Redford, S, Reece, W, Ricciardi, S, Rinnert, K, Robbe, P, Rodrigues, E, Rodrigues, F, Cobo, CR, Perez, PR, Rogers, GJ, Romanovsky, V, Rospabe, G, Ruf, T, Ruiz, H, Sabatino, G, Silva, JJS, Sagidova, N, Saitta, B, Salzmann, C, Varela, AS, Sannino, M, Santacesaria, R, Santinelli, R, Santovetti, E, Sapunov, M, Sarti, A, Satriano, C, Satta, A, Savrie, M, Savrina, D, Schaack, P, Schiller, M, Schleich, S, Schmelling, M, Schmidt, B, Schneider, O, Schopper, A, Schune, M-H, Schwemmer, R, Sciubba, A, Seco, M, Semennikov, A, Senderowska, K, Serra, N, Serrano, J, Shao, B, Shapkin, M, Shapoval, I, Shatalov, P, Shcheglov, Y, Shears, T, Shekhtman, L, Shevchenko, V, Simioni, E, Skottowe, HP, Skwarnicki, T, Smith, AC, Sobczak, K, Soler, FJP, Solomin, A, Somogy, P, Soomro, F, Paula, BSD, Spaan, B, Sparkes, A, Spiridenkov, E, Spradlin, P, Stagni, F, Steinkamp, O, Stoica, S, Stone, S, Storaci, B, Straumann, U, Styles, N, Syryczynski, K, Szczekowski, M, Szczypka, P, Szumlak, T, T'Jampens, S, Terrier, H, Teubert, F, Thomas, C, Thomas, E, Tobin, M, Topp-Joergensen, S, Tran, MT, Traynor, S, Tsaregorodtsev, A, Tuning, N, Ukleja, A, Ullaland, O, Uwer, U, Vagnoni, V, Valenti, G, Beuzekom, MV, Brand, JVD, Eijk, DV, Herwijnen, EV, Lysebetten, AV, Tilburg, JV, Gomez, RV, Regueiro, PV, Vecchi, S, Velthuis, JJ, Veltri, M, Vervink, K, Viaud, B, Videau, I, Vilasis-Cardona, X, Vollhardt, A, Vorobyev, A, Voss, H, Wacker, K, Wandernoth, S, Wang, J, Ward, DR, Websdale, D, Whitehead, M, Wiedner, D, Wiggers, L, Wilkinson, G, Williams, M, Wilson, FF, Witek, M, Witzeling, W, Wotton, SA, Wyllie, K, Xie, Y, Xing, F, Yang, Z, Smit, GY, Young, R, Yushchenko, O, Zhang, L, Zhang, Y, Zhelezov, A, and Zwahlen, N

Subjects
Physics::Instrumentation and Detectors, hep-ex, High Energy Physics::Experiment
Abstract

Six of the key physics measurements that will be made by the LHCb experiment, concerning CP asymmetries and rare B decays, are discussed in detail. The road map towards the precision measurements is presented, including the use of control channels and other techniques to understand the performance of the detector with the first data from the LHC.

Published
2010

3. Measurement of sigma(pp -> b anti-b X) at sqrt(s)=7 TeV in the forward region

Author

Collaboration, L, Aaij, R, Beteta, CA, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Agari, M, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Alfonsi, M, Cartelle, PA, Jr, AAA, Amato, S, Amhis, Y, Amoraal, J, Anderson, J, Nobrega, RA, Appleby, R, Gutierrez, OA, Arefyev, A, Arrabito, L, Artuso, M, Aslanides, E, Auriemma, G, Bachmann, S, Bagaturia, Y, Bailey, DS, Balagura, V, Baldini, W, Barber, G, Barham, C, Barlow, RJ, Barsuk, S, Basiladze, S, Bates, A, Bauer, C, Bauer, T, Bay, A, Bediaga, I, Bellunato, T, Belous, K, Belyaev, I, Benayoun, M, Bencivenni, G, Bernet, R, Bernhard, RP, Bettler, MO, Beuzekom, MV, Bibby, JH, Bifani, S, Bizzeti, A, Bjørnstad, PM, Blake, T, Blanc, F, Blanks, C, Blouw, J, Blusk, S, Bobrov, A, Bocci, V, Bochin, B, Bonaccorsi, E, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borgia, A, Bos, E, Bowcock, TJV, Bozzi, C, Brambach, T, Brand, JVD, Brarda, L, Bressieux, J, Brisbane, S, Britsch, M, Brook, NH, Brown, H, Brusa, S, Büchler-Germann, A, Bursche, A, Buytaert, J, Cadeddu, S, Carvajal, JMC, Callot, O, Calvi, M, Gomez, MC, Camboni, A, Cameron, W, Camilleri, L, Campana, P, Carbone, A, Carboni, G, Cardinale, R, Cardini, A, Carroll, J, Carson, L, Akiba, KC, Casse, G, Cattaneo, M, Chadaj, B, Charles, M, Charpentier, P, Cheng, J, Chiapolini, N, Chlopik, A, Christiansen, J, Ciambrone, P, Vidal, XC, Clark, PJ, Clarke, PEL, Clemencic, M, Cliff, HV, Closier, J, Coca, C, Coco, V, Cogan, J, Collins, P, Comerma-Montells, A, Constantin, F, Conti, G, Contu, A, Cooke, P, Coombes, M, Corajod, B, Corti, G, Cowan, GA, Currie, R, D'Almagne, B, D'Ambrosio, C, D'Antone, I, Silva, WD, Dane', E, David, P, Bonis, ID, Capua, SD, Cian, MD, Lorenzi, FD, Miranda, JMD, Paula, LD, Simone, PD, Decamp, D, Decreuse, G, Degaudenzi, H, Deissenroth, M, Buono, LD, Densham, CJ, Deplano, C, Deschamps, O, Dettori, F, Dickens, J, Dijkstra, H, Dima, M, Donleavy, S, Dornan, P, Dossett, D, Dovbnya, A, Dumps, R, Dupertuis, F, Dwyer, L, Dzhelyadin, R, Eames, C, Easo, S, Egede, 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A, Tuning, N, Ukleja, A, Ullaland, O, Urquijo, P, Uwer, U, Vagnoni, V, Valenti, G, Gomez, RV, Regueiro, PV, Vecchi, S, Velthuis, JJ, Veltri, M, Vervink, K, Viaud, B, Videau, I, Vilasis-Cardona, X, Visniakov, J, Vollhardt, A, Volyanskyy, D, Voong, D, Vorobyev, A, Voss, H, Wacker, K, Wandernoth, S, Wang, J, Ward, DR, Webber, AD, Websdale, D, Whitehead, M, Wiedner, D, Wiggers, L, Wilkinson, G, Williams, MP, Williams, M, Wilson, FF, Wishahi, J, Witek, M, Witzeling, W, Woodward, ML, Wotton, SA, Wyllie, K, Xie, Y, Xing, F, Yang, Z, Smit, GY, Young, R, Yushchenko, O, Zeng, M, Zhang, L, Zhang, Y, Zhelezov, A, Zverev, E, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Calcul de l'IN2P3 (CC-IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), LHCb, R. 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DOSSETT, A. DOVBNYA, R. DUMPS, F. DUPERTUIS, L. DWYER, R. DZHELYADIN, C. EAMES, S. EASO, U. EGEDE, V. EGORYCHEV, S. EIDELMAN, D. VAN EIJK, F. EISELE, S. EISENHARDT, L. EKLUND, D.G. D'ENTERRIA, D. ESPERANTE PEREIRA, L. ESTÈVE, E. FANCHINI, C. FÄRBER, G. FARDELL, C. FARINELLI, S. FARRY, V. FAVE, G. FELICI, V. FERNANDEZ ALBOR, M. FERRO-LUZZI, S. FILIPPOV, C. FITZPATRICK, W. FLEGEL, F. FONTANELLI, C. FORTI, R. FORTY, C. FOURNIER, B. FRANEK, M. FRANK, C. FREI, M. FROSINI, J.L. FUNGUEIRINO PAZOS, S. FURCAS, A. GALLAS TORREIRA, D. GALLI, M. GANDELMAN, P. GANDINI, Y. GAO, J-C. GARNIER, L. GARRIDO, D. GASCON, C. GASPAR, A. GASPAR DE VALENZUELA CUE, J. GASSNER, N. GAUVIN, P. GAVILLET, M. GERSABECK, T. GERSHON, PH. GHEZ, V. GIBSON, V.V. GLIGOROV, C. GÖBEL, D. GOLUBKOV, A. GOLUTVIN, A. GOMES, G. GONG, H. GONG, H. GORDON, M. GRABALOSA GÁNDARA, V. GRACCO, R. GRACIANI DIAZ, L.A. GRANADO CARDOSO, E. GRAUGÉS, G. GRAZIANI, A. GRECU, S. GREGSON, G. GUERRER, B. GUI, E. GUSHCHIN, YU. GUZ, Z. GUZIK, T. 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YOUNG, O. YUSHCHENKO, M. ZENG, L. ZHANG, Y. ZHANG, A. ZHELEZOV, E. ZVEREV, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
13.85.-t, b-hadron, cross-section, +10+GeV%29%22">Hadron-induced high- and super-high-energy interactions (energy > 10 GeV), bottom production, Nuclear Theory, High Energy Physics::Phenomenology, Bottom quark, LHC, b-quark, High Energy Physics - Experiment, 14.65.Fy, 13.10.He, 13.75Cs, 13.85-t, High Energy Physics - Phenomenology, LHCb, 13.20.He, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Leptonic semileptonic and radiative decays of bottom meson, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 13.75.C, Nuclear Experiment, Nucleon-nucleon interaction, 14.65.Fy
Abstract

Decays of b hadrons into final states containing a D0 meson and a muon are used to measure the b anti-b production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. In the pseudorapidity interval 2 < eta < 6 and integrated over all transverse momenta we find that the average cross-section to produce b-flavoured or anti-b-flavoured hadrons is (75.3 +/- 5.4 +/- 13.0) microbarns., Comment: 11 pages, 5 figures, to be published in Physics Lett. B; v2 minor changes

Published
2010
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4. Prompt K(S)(0) production in pp collisions at root s=0.9 TeV

Author

Aaij, R, Beteta, C, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Agari, M, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Alfonsi, M, Cartelle, P, Alves, A, Amato, S, Amhis, Y, Amoraal, J, Anderson, J, Nobrega, R, Appleby, R, Gutierrez, O, Arefyev, A, Arrabito, L, Artuso, M, Aslanides, E, Auriemma, G, Bachmann, S, Bagaturia, Y, Bailey, D, Balagura, V, Baldini, W, Barber, G, Barham, C, Barlow, R, Barsuk, S, Basiladze, S, Bates, A, Bauer, C, Bauer, T, Bay, A, Bediaga, I, Bellunato, T, Belous, K, Belyaev, I, Benayoun, M, Bencivenni, G, Bernet, R, Bernhard, R, Bettler, M, van Beuzekom, M, Bibby, J, Bifani, S, Bizzeti, A, Bjornstad, P, Blake, T, Blanc, F, Blanks, C, Blouw, J, Blusk, S, Bobrov, A, Bocci, V, Bochin, B, Bonaccorsi, E, Bondar, A, Bondar, N, Bonivento, W, Borghi, S, Borgia, A, Bos, E, Bowcock, T, Bozzi, C, Brambach, T, van den Brand, J, Brarda, L, Bressieux, J, Brisbane, S, Britsch, M, Brook, N, Brown, H, Brusa, S, Buchler Germann, A, Bursche, A, Buytaert, J, Cadeddu, S, Carvajal, J, Callot, O, Calvi, M, Gomez, M, Camboni, A, Cameron, W, Camilleri, L, Campana, P, Carbone, A, Carboni, G, Cardinale, R, Cardini, A, Carroll, J, Carson, L, Akiba, K, Casse, G, Cattaneo, M, Chadaj, B, Charles, M, Charpentier, P, Cheng, J, Chiapolini, N, Chlopik, A, Christiansen, J, Ciambrone, P, Vidal, X, Clark, P, Clarke, P, Clemencic, M, Cliff, H, Closier, J, Coca, C, Coco, V, Cogan, J, Collins, P, Comerma Montells, A, Constantin, F, Conti, G, Contu, A, Cooke, P, Coombes, M, Corajod, B, Corti, G, Cowan, G, Currie, R, D'Almagne, B, D'Ambrosio, C, D'Antone, I, Da Silva, W, Dane', E, David, P, De Bonis, I, De Capua, S, De Cian, M, De Lorenzi, F, De Miranda, J, De Paula, L, De Simone, P, Decamp, D, Decreuse, G, Degaudenzi, H, Deissenroth, M, Del Buono, L, Densham, C, Deplano, C, Deschamps, O, Dettori, F, Dickens, J, Dijkstra, H, Dima, M, Donleavy, S, Dornan, R, Dossett, D, Dovbnya, A, Dumps, R, Dupertuis, F, Dwyer, L, Dzhelyadin, R, Eames, C, Easo, S, Egede, U, Egorychev, V, 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Abstract

The production of K(S)(0) mesons in pp collisions at a centre-of-mass energy of 0.9 TeV is studied with the LHCb detector at the Large Hadron Collider. The luminosity of the analysed sample is determined using a novel technique, involving measurements of the beam currents, sizes and positions, and is found to be 6.8 +/- 1.0 mu b(-1). The differential prompt K(S)(0) production cross-section is measured as a function of the K(S)(0) transverse momentum and rapidity in the region 0 < p(T) < 1.6 GeV/c and 2.5 < y < 4.0. The data are found to be in reasonable agreement with previous measurements and generator expectations.

Published
2010

5. Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target.

Author

Airapetian A, Akopov N, Akopov Z, Amarian M, Andrus A, Aschenauer EC, Augustyniak W, Avakian R, Avetissian A, Avetissian E, Bacchetta A, Bailey P, Balin D, Beckmann M, Belostotski S, Bianchi N, Blok HP, Böttcher H, Borissov A, Borysenko A, Bouwhuis M, Brüll A, Bryzgalov V, Capitani GP, Cappiluppi M, Chen T, Ciullo G, Contalbrigo M, Dalpiaz PF, Leo RD, Demey M, Nardo LD, Sanctis ED, Devitsin E, Nezza PD, Düren M, Ehrenfried M, Elalaoui-Moulay A, Elbakian G, Ellinghaus F, Elschenbroich U, Fabbri R, Fantoni A, Fechtchenko A, Felawka L, Frullani S, Gapienko G, Gapienko V, Garibaldi F, Garrow K, Gavrilov G, Gharibyan V, Grebeniouk O, Gregor IM, Hadjidakis C, Hafidi K, Hartig M, Hasch D, Henoch M, Hesselink WH, Hillenbrand A, Hoek M, Holler Y, Hommez B, Hristova I, Iarygin G, Ilyichev A, Ivanilov A, Izotov A, Jackson HE, Jgoun A, Kaiser R, Kinney E, Kisselev A, Kobayashi T, Kopytin M, Korotkov V, Kozlov V, Krauss B, Krivokhijine VG, Lagamba L, Lapikás L, Laziev A, Lenisa P, Liebing P, Linden-Levy LA, Lorenzon W, Lu H, Lu J, Lu S, Ma BQ, Maiheu B, Makins NC, Mao Y, Marianski B, Marukyan H, Masoli F, Mexner V, Meyners N, Michler T, Mikloukho O, Miller CA, Miyachi Y, Muccifora V, Nagaitsev A, Nappi E, Naryshkin Y, Nass A, Negodaev M, Nowak WD, Oganessyan K, Ohsuga H, Osborne A, Pickert N, Potterveld DH, Raithel M, Reggiani D, Reimer PE, Reischl A, Reolon AR, Riedl C, Rith K, Rosner G, Rostomyan A, Rubacek L, Rubin J, Ryckbosch D, Salomatin Y, Sanjiev I, Savin I, Schäfer A, Schill C, Schnell G, Schüler KP, Seele J, Seidl R, Seitz B, Shanidze R, Shearer C, Shibata TA, Shutov V, Sinram K, Sommer W, Stancari M, Statera M, Steffens E, Steijger JJ, Stenzel H, Stewart J, Stinzing F, Tait P, Tanaka H, Taroian S, Tchuiko B, Terkulov A, Trzcinski A, Tytgat M, Vandenbroucke A, van der Nat PB, van der Steenhoven G, van Haarlem Y, Vetterli MC, Vikhrov V, Vincter MG, Vogel C, Volmer J, Wang S, Wendland J, Wilbert J, Smit GY, Ye Y, Ye Z, Yen S, Zihlmann B, and Zupranski P

Abstract

Single-spin asymmetries for semi-inclusive electroproduction of charged pions in deep-inelastic scattering of positrons are measured for the first time with transverse target polarization. The asymmetry depends on the azimuthal angles of both the pion (phi) and the target spin axis (phi(S)) about the virtual-photon direction and relative to the lepton scattering plane. The extracted Fourier component sin((phi+phi(S))(pi)(UT) is a signal of the previously unmeasured quark transversity distribution, in conjunction with the Collins fragmentation function, also unknown. The component sin((phi-phi(S)(pi)(UT) arises from a correlation between the transverse polarization of the target nucleon and the intrinsic transverse momentum of quarks, as represented by the previously unmeasured Sivers distribution function. Evidence for both signals is observed, but the Sivers asymmetry may be affected by exclusive vector meson production.

Published
2005
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