The kinematic dependences of the relative production rates, f(Lambda b)(0)/f(d), of Lambda(0)(b) baryons and B-0 mesons are measured using Lambda(0)(b) -> Lambda(+)(c)pi(-) and (B) over bar (0) -> D+pi(-) decays. The measurements use proton-proton collision data, corresponding to an integrated luminosity of 1 fb(-1) at a centre-of-mass energy of 7 TeV, recorded in the forward region with the LHCb experiment. The relative production rates are observed to depend on the transverse momentum, pT, and pseudorapidity, eta, of the beauty hadron, in the studied kinematic region 1.5 < pT < 40 GeV/c and 2 < eta < 5. Using a previous LHCb measurement of f(Lambda b)(0)/f(d) in semileptonic decays, the branching fraction B (Lambda(0)(b) -> Lambda(+)(c)pi(-)) = (4.30 +/- 0.03(-0.11)(+0.12)+/- 0.26 +/- 0.21) x 10(-3) is obtained, where the first uncertainty is statistical, the second is systematic, the third is from the previous LHCb measurement of f(Lambda b)(0)/f(d) and the fourth is due to the (B) over bar (0) -> D+pi(-) branching fraction. This is the most precise measurement of a Lambda(0)(b) branching fraction to date.

Study of the kinematic dependences of Λ b 0 production in pp collisions and a measurement of the Λ b 0  → Λ c + π − branching fraction / R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P..A. Cartelle, A..A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. Anderson, R. Andreassen, M. Andreotti, J..E. Andrews, R.B. Appleby, O.A. Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J..J. Back, A. Badalov, V. Balagura, W. Baldini, R..J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, 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, M. Bettler, M. van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P..M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, M. Borsato, T..J..V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. van den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, N..H. Brook, H. Brown, A. Bursche, G. Busetto, J. Buytaert, S. Cadeddu, R. Calabrese, O. Callot, M. Calvi, M..C. Gomez, A. Camboni, P. Campana, D..C. Perez, A. Carbone, G. Carboni, R. Cardinale, A. Cardini, H. Carranza Mejia, L. Carson, K..C. Akiba, G. Casse, L. Cassina, L..C. Garcia, M. Cattaneo, C. Cauet, R. Cenci, M. Charles, P. Charpentier, S. Cheung, N. Chiapolini, M. Chrzaszcz, K. Ciba, X..C. Vidal, G. Ciezarek, P..E..L. Clarke, M. Clemencic, H..V. 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, M. Corvo, I. Counts, B. Couturier, G..A. Cowan, D..C. Craik, M..C. Torres, S. Cunliffe, R. Currie, C. D’Ambrosio, J. Dalseno, P. David, P..N..Y. David, A. Davis, K. De Bruyn, S. De Capua, M. De Cian, J.M. 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..D. Suárez, D. Dossett, A. Dovbnya, 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, C. Elsasser, S. Esen, T. Evans, A. Falabella, C. Färber, C. Farinelli, S. Farry, D. Ferguson, V..F. Albor, F..F. 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..G. Torreira, D. Galli, S. Gambetta, M. Gandelman, P. Gandini, Y. Gao, J. Garofoli, J..G. Tico, L. Garrido, C. Gaspar, R. Gauld, L. Gavardi, E. Gersabeck, M. Gersabeck, T. Gershon, P. Ghez, A. Gianelle, S. Giani’, V. Gibson, L. Giubega, V..V. Gligorov, C. Göbel, D. Golubkov, A. Golutvin, A. Gomes, H. Gordon, C. Gotti, M..G. Gándara, R..G. Diaz, L..A..G. Cardoso, E. Graugés, G. Graziani, A. Grecu, E. Greening, S. Gregson, P. Griffith, L. Grillo, O. Grünberg, B. Gui, E. Gushchin, Y. Guz, T. Gys, C. Hadjivasiliou, G. Haefeli, C. Haen, S..C. Haines, S. Hall, B. Hamilton, T. Hampson, X. Han, S. Hansmann Menzemer, N. Harnew, S..T. Harnew, J. Harrison, T. Hartmann, J. He, T. Head, V. Heijne, K. Hennessy, P. Henrard, L. Henry, J..A..H. 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, M. Jezabek, F. Jing, M. John, D. Johnson, C..R. Jones, C. Joram, B. Jost, N. Jurik, M. Kaballo, S. Kandybei, W. Kanso, M. Karacson, T..M. Karbach, M. Kelsey, I..R. Kenyon, T. Ketel, B. Khanji, C. Khurewathanakul, S. Klaver, O. Kochebina, M. Kolpin, I. Komarov, R..F. 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, V..N. La Thi, D. Lacarrere, G. Lafferty, A. Lai, D. Lambert, R..W. Lambert, E. Lanciotti, G. Lanfranchi, C. Langenbruch, B. Langhans, T. Latham, C. Lazzeroni, R. Le Gac, J. van Leerdam, J. Lees, R. Lefèvre, A. Leflat, J. Lefrançois, S. Leo, O. Leroy, T. Lesiak, B. Leverington, Y. Li, M. Liles, R. Lindner, C. Linn, F. Lionetto, B. Liu, G. Liu, S. Lohn, I. Longstaff, J..H. Lopes, N. Lopez March, P. Lowdon, H. Lu, D. Lucchesi, H. Luo, A. Lupato, E. Luppi, O. Lupton, F. Machefert, I..V. Machikhiliyan, F. Maciuc, O. Maev, S. Malde, G. Manca, G. Mancinelli, M. Manzali, J. Maratas, J..F. Marchand, U. Marconi, C..M. Benito, P. Marino, R. Märki, J. Marks, G. Martellotti, A. Martens, A..M. Sánchez, M. Martinelli, D..M. Santos, F..M. Vidal, D..M. 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, D..A. Milanes, M. Minard, J..M. Rodriguez, S. Monteil, D. Moran, M. Morandin, P. Morawski, A. Mordà, M..J. Morello, J. Moron, R. Mountain, F. Muheim, K. Müller, R. Muresan, B. Muster, P. Naik, T. Nakada, R. Nandakumar, I. Nasteva, M. Needham, N. Neri, S. Neubert, N. Neufeld, M. Neuner, A..D. Nguyen, T..D. Nguyen, C. Nguyen Mau, M. Nicol, V. Niess, R. Niet, N. Nikitin, T. Nikodem, A. Novoselov, A. Oblakowska Mucha, V. Obraztsov, S. Oggero, S. Ogilvy, O. Okhrimenko, R. Oldeman, G. Onderwater, M. Orlandea, J..M..O. Goicochea, P. Owen, A. Oyanguren, B..K. Pal, A. Palano, F. Palombo, M. Palutan, J. Panman, A. Papanestis, M. Pappagallo, C. Parkes, C..J. Parkinson, G. Passaleva, G..D. Patel, M. Patel, C. Patrignani, A..P. Alvarez, A. Pearce, A. Pellegrino, M..P. Altarelli, S. Perazzini, E..P. Trigo, P. Perret, M. Perrin Terrin, L. Pescatore, E. Pesen, K. Petridis, A. Petrolini, E..P. Olloqui, B. Pietrzyk, T. Pilař, D. Pinci, A. Pistone, S. Playfer, M..P. Casasus, F. Polci, A. Poluektov, E. Polycarpo, A. Popov, D. Popov, B. Popovici, C. Potterat, A. Powell, J. Prisciandaro, A. Pritchard, C. Prouve, V. Pugatch, A..P. Navarro, G. Punzi, W. Qian, B. Rachwal, J..H. Rademacker, B. Rakotomiaramanana, M. Rama, M..S. Rangel, I. Raniuk, N. Rauschmayr, G. Raven, S. Reichert, M..M. Reid, A..C. dos Reis, S. Ricciardi, A. Richards, K. Rinnert, V..R. Molina, D..A..R. Romero, P. Robbe, A..B. Rodrigues, E. Rodrigues, P..R. Perez, S. Roiser, V. Romanovsky, A..R. Vidal, M. Rotondo, J. Rouvinet, T. Ruf, F. Ruffini, H. Ruiz, P..R. Valls, G. Sabatino, J..J..S. Silva, N. Sagidova, P. Sail, B. Saitta, V..S. Guimaraes, C..S. Mayordomo, B..S. Sedes, R. Santacesaria, C..S. 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. Schune, R. Schwemmer, B. Sciascia, A. Sciubba, M. Seco, A. Semennikov, K. Senderowska, 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..S. Coutinho, G. Simi, M. Sirendi, N. Skidmore, T. Skwarnicki, N..A. Smith, E. Smith, E. Smith, J. Smith, M. Smith, H. Snoek, M..D. Sokoloff, F..J..P. Soler, F. Soomro, D. Souza, B..S. De Paula, B. Spaan, A. Sparkes, F. Spinella, P. Spradlin, F. Stagni, S. Stahl, O. Steinkamp, O. Stenyakin, S. Stevenson, S. Stoica, S. Stone, B. Storaci, S. Stracka, M. Straticiuc, U. Straumann, R. Stroili, V..K. 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, 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, M..T. Tran, M. Tresch, A. Tsaregorodtsev, P. Tsopelas, N. Tuning, M..U. Garcia, A. Ukleja, A. Ustyuzhanin, U. Uwer, V. Vagnoni, G. Valenti, A. Vallier, R..V. Gomez, P..V. Regueiro, C..V. Sierra, S. Vecchi, J..J. Velthuis, M. Veltri, G. Veneziano, M. Vesterinen, B. Viaud, D. Vieira, M..V. Diaz, X. Vilasis Cardona, A. Vollhardt, D. Volyanskyy, D. Voong, A. Vorobyev, V. Vorobyev, C. Voß, H. Voss, J..A. de Vries, R. Waldi, C. Wallace, R. Wallace, J. Walsh, S. Wandernoth, J. Wang, D..R. Ward, N..K. Watson, A..D. Webber, D. Websdale, M. Whitehead, J. Wicht, D. Wiedner, G. Wilkinson, M..P. Williams, M. Williams, F..F. Wilson, J. Wimberley, J. Wishahi, W. Wislicki, M. Witek, G. Wormser, S..A. Wotton, S. Wright, S. Wu, K. Wyllie, Y. Xie, Z. Xing, Z. Xu, Z. Yang, X. Yuan, O. Yushchenko, M. Zangoli, M. Zavertyaev, F. Zhang, L. Zhang, W..C. Zhang, Y. Zhang, A. Zhelezov, A. Zhokhov, L. Zhong, A. Zvyagin. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2014:8(2014), pp. 143.1-143.18. [10.1007/JHEP08(2014)143]

Study of the kinematic dependences of Λ b 0 production in pp collisions and a measurement of the Λ b 0  → Λ c + π − branching fraction

N. Neri;F. Palombo;
2014

Abstract

The kinematic dependences of the relative production rates, f(Lambda b)(0)/f(d), of Lambda(0)(b) baryons and B-0 mesons are measured using Lambda(0)(b) -> Lambda(+)(c)pi(-) and (B) over bar (0) -> D+pi(-) decays. The measurements use proton-proton collision data, corresponding to an integrated luminosity of 1 fb(-1) at a centre-of-mass energy of 7 TeV, recorded in the forward region with the LHCb experiment. The relative production rates are observed to depend on the transverse momentum, pT, and pseudorapidity, eta, of the beauty hadron, in the studied kinematic region 1.5 < pT < 40 GeV/c and 2 < eta < 5. Using a previous LHCb measurement of f(Lambda b)(0)/f(d) in semileptonic decays, the branching fraction B (Lambda(0)(b) -> Lambda(+)(c)pi(-)) = (4.30 +/- 0.03(-0.11)(+0.12)+/- 0.26 +/- 0.21) x 10(-3) is obtained, where the first uncertainty is statistical, the second is systematic, the third is from the previous LHCb measurement of f(Lambda b)(0)/f(d) and the fourth is due to the (B) over bar (0) -> D+pi(-) branching fraction. This is the most precise measurement of a Lambda(0)(b) branching fraction to date.
hadron-hadron scattering; B physics; heavy quark production; branching fraction; particle and resonance production
Settore FIS/04 - Fisica Nucleare e Subnucleare
2014
Article (author)
File in questo prodotto:
File Dimensione Formato  
art%3A10.1007%2FJHEP08%282014%29143.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 729.11 kB
Formato Adobe PDF
729.11 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/268242
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 59
  • ???jsp.display-item.citation.isi??? 51
social impact