First Observation of Top Quark Production in the Forward Region

Aaij, R; Adeva, B; Adinolfi, M; Affolder, A; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Ali, S; Alkhazov, G; Alvarez Cartelle, P; Alves, A. A; Amato, S; Amerio, S; Amhis, Y; An, L; Anderlini, L; Anderson, J; Andreotti, M; Andrews, J. E; Appleby, R. B; Aquines Gutierrez, O; Archilli, F; D'Argent, P; Artamonov, A; Artuso, M; Aslanides, E; Auriemma, G; Baalouch, M; Bachmann, S; Back, J. J; Badalov, A; Baesso, C; Baldini, W; Barlow, R. J; Barschel, C; Barsuk, S; Barter, W; Batozskaya, V; Battista, V; Bay, A; Beaucourt, L; Beddow, J; Bedeschi, F; Bediaga, I; Bel, L. J; Belyaev, I; Ben Haim, E; Bencivenni, G; Benson, S; Benton, J; Berezhnoy, A; Bernet, R; Bertolin, A; Bettler, M. O; van Beuzekom, M; Bien, A; Bifani, S; Bird, T; Birnkraut, A; Bizzeti, A; Blake, T; Blanc, F; Blouw, J; Blusk, S; Bocci, V; Bondar, A; Bondar, N; Bonivento, W; Borghi, S; Borsato, M; Bowcock, T. J. V; Bowen, E; Bozzi, C; Braun, S; Brett, D; Britsch, M; Britton, T; Brodzicka, J; Brook, N. H; Bursche, A; Buytaert, J; Cadeddu, S; Calabrese, R; Calvi, M; Calvo Gomez, M; Campana, P; Campora Perez, D; Capriotti, L; Carbone, A; Carboni, G; Cardinale, R; Cardini, A; Carniti, P; Carson, L; Carvalho Akiba, K; Casse, G; Cassina, L; Castillo Garcia, L; Cattaneo, M; Cauet, Ch; Cavallero, G; Cenci, Riccardo; Charles, M; Charpentier, Ph; Chefdeville, M; Chen, S; Cheung, S. F; Chiapolini, N; Chrzaszcz, M; Cid Vidal, X; Ciezarek, G; Clarke, P. E. L; Clemencic, M; Cliff, H. V; Closier, J; Coco, V; Cogan, J; Cogneras, E; Cogoni, V; Cojocariu, L; Collazuol, G; Collins, P; Comerma Montells, A; Contu, A; Cook, A; Coombes, M; Coquereau, S; Corti, G; Corvo, M; Couturier, B; Cowan, G. A; Craik, D. C; Crocombe, A; Cruz Torres, M; Cunliffe, S; Currie, R; D'Ambrosio, C; Dalseno, J; David, P. N. Y; Davis, A; De Bruyn, K; De Capua, S; De Cian, M; De Miranda, J. M; De Paula, L; De Silva, W; De Simone, P; Dean, C. T; Decamp, D; Deckenhoff, M; Del Buono, L; Deleage, N; Demmer, M; Derkach, D; Deschamps, O; Dettori, F; Di Canto, A; Di Ruscio, F; Dijkstra, H; Donleavy, S; Dordei, F; Dorigo, M; Dosil Suarez, A; Dossett, D; Dovbnya, A; Dreimanis, K; Dufour, L; Dujany, G; Dupertuis, F; Durante, P; Dzhelyadin, R; Dziurda, A; Dzyuba, A; Easo, S; Egede, U; Egorychev, V; Eidelman, S; Eisenhardt, S; Eitschberger, U; Ekelhof, R; Eklund, L; El Rifai, I; Elsasser, Ch; Ely, S; Esen, S; Evans, H. M; Evans, T; Falabella, A; Farber, C; Farinelli, C; Farley, N; Farry, S; Fay, R; Ferguson, D; Fernandez Albor, V; Ferrari, F; Ferreira Rodrigues, F; Ferro Luzzi, M; Filippov, S; Fiore, M; Fiorini, M; Firlej, M; Fitzpatrick, C; Fiutowski, T; Fohl, K; Fol, P; Fontana, M; Fontanelli, F; Forty, R; Francisco, O; Frank, M; Frei, C; Frosini, M; Fu, J; Furfaro, E; Gallas Torreira, A; Galli, D; Gallorini, S; Gambetta, S; Gandelman, M; Gandini, P; Gao, Y; Garcia Pardinas, J; Garofoli, J; Garra Tico, J; Garrido, L; Gascon, D; Gaspar, C; Gastaldi, U; Gauld, R; Gavardi, L; Gazzoni, G; Geraci, A; Gerick, D; Gersabeck, E; Gersabeck, M; Gershon, T; Ghez, Ph; Gianelle, A; Giani, S; Gibson, V; Girard, O. G; Giubega, L; Gligorov, V. V; Gobel, C; Golubkov, D; Golutvin, A; Gomes, A; Gotti, C; Grabalosa Gandara, M; Graciani Diaz, R; Granado Cardoso, L. A; Grauges, E; Graverini, E; Graziani, G; Grecu, A; Greening, E; Gregson, S; Griffith, P; Grillo, L; Grunberg, O; Gui, B; Gushchin, E; Guz, Yu; Gys, T; Hadavizadeh, T; Hadjivasiliou, C; Haefeli, G; Haen, C; Haines, S. C; Hall, S; Hamilton, B; Hampson, T; Han, X; Hansmann Menzemer, S; Harnew, N; Harnew, S. T; Harrison, J; He, J; Head, T; Heijne, V; Hennessy, K; Henrard, P; Henry, L; Hernando Morata, J. A; van Herwijnen, E; Hess, M; Hicheur, A; Hill, D; Hoballah, M; Hombach, C; Hulsbergen, W; Humair, T; Hussain, N; Hutchcroft, D; Hynds, D; Idzik, M; Ilten, P; Jacobsson, R; Jaeger, A; Jalocha, J; Jans, E; Jawahery, A; Jing, F; John, M; Johnson, D; Jones, C. R; Joram, C; Jost, B; Jurik, N; Kandybei, S; Kanso, W; Karacson, M; Karbach, T. M; Karodia, S; Kelsey, M; Kenyon, I. R; Kenzie, M; Ketel, T; Khanji, B; Khurewathanakul, C; Klaver, S; Klimaszewski, K; Kochebina, O; Kolpin, M; Komarov, I; Koopman, R. F; Koppenburg, P; Korolev, M; Kozeiha, M; Kravchuk, L; Kreplin, K; Kreps, M; Krocker, G; Krokovny, P; Kruse, F; Kucewicz, W; Kucharczyk, M; Kudryavtsev, V; Kuonen, A. K; Kurek, K; Kvaratskheliya, T; La Thi, V. N; Lacarrere, D; Lafferty, G; Lai, A; Lambert, D; Lambert, R. W; Lanfranchi, G; Langenbruch, C; Langhans, B; Latham, T; Lazzeroni, C; Le Gac, R; van Leerdam, J; Lees, J. P; Lefevre, R; Leflat, A; Lefrancois, J; Leroy, O; Lesiak, T; Leverington, B; Li, Y; Likhomanenko, T; Liles, M; Lindner, R; Linn, C; Lionetto, F; Liu, B; Liu, X; Loh, D; Lohn, S; Longstaff, I; Lopes, J. H; Lucchesi, D; Lucio Martinez, M; Luo, H; Lupato, A; Luppi, E; Lupton, O; Machefert, F; Maciuc, F; Maev, O; Maguire, K; Malde, S; Malinin, A; Manca, G; Mancinelli, G; Manning, P; Mapelli, A; Maratas, J; Marchand, J. F; Marconi, U; Marin Benito, C; Marino, Pietro; Marki, R; Marks, J; Martellotti, G; Martin, M; Martinelli, M; Martinez Santos, D; Martinez Vidal, F; Martins Tostes, D; Massafferri, A; Matev, R; Mathad, A; Mathe, Z; Matteuzzi, C; Matthieu, K; Mauri, A; Maurin, B; Mazurov, A; Mccann, M; Mccarthy, J; Mcnab, A; Mcnulty, R; Meadows, B; Meier, F; Meissner, M; Melnychuk, D; Merk, M; Milanes, D. A; Minard, M. N; Mitzel, D. S; Molina Rodriguez, J; Monteil, S; Morandin, M; Morawski, P; Morda, A; Morello, Michael Joseph; Moron, J; Morris, A. B; Mountain, R; Muheim, F; Muller, J; Muller, K; Muller, V; Mussini, M; Muster, B; Naik, P; Nakada, T; Nandakumar, R; Nandi, A; Nasteva, I; Needham, M; Neri, N; Neubert, S; Neufeld, N; Neuner, M; Nguyen, A. D; Nguyen, T. D; Nguyen Mau, C; Niess, V; Niet, R; Nikitin, N; Nikodem, T; Ninci, D; Novoselov, A; O'Hanlon, D. P; Oblakowska Mucha, A; Obraztsov, V; Ogilvy, S; Okhrimenko, O; Oldeman, R; Onderwater, C. J. G; Osorio Rodrigues, B; Otalora Goicochea, J. M; Otto, A; Owen, P; Oyanguren, A; Palano, A; Palombo, F; Palutan, M; Panman, J; Papanestis, A; Pappagallo, M; Pappalardo, L. L; Pappenheimer, C; Parkes, C; Passaleva, G; Patel, G. D; Patel, M; Patrignani, C; Pearce, A; Pellegrino, A; Penso, G; Pepe Altarelli, M; Perazzini, S; Perret, P; Pescatore, L; Petridis, K; Petrolini, A; Petruzzo, M; Picatoste Olloqui, E; Pietrzyk, B; Pilar, T; Pinci, D; Pistone, A; Piucci, A; Playfer, S; Plo Casasus, M; Poikela, T; Polci, F; Poluektov, A; Polyakov, I; Polycarpo, E; Popov, A; Popov, D; Popovici, B; Potterat, C; Price, E; Price, J. D; Prisciandaro, J; Pritchard, A; Prouve, C; Pugatch, V; Puig Navarro, A; Punzi, G; Qian, W; Quagliani, R; Rachwal, B; Rademacker, J. H; Rakotomiaramanana, B; Rama, M; Rangel, M. S; Raniuk, I; Rauschmayr, N; Raven, G; Redi, F; Reichert, S; Reid, M. M; Dos Reis, A. C; Ricciardi, S; Richards, S; Rihl, M; Rinnert, K; Rives Molina, V; Robbe, P; Rodrigues, A. B; Rodrigues, E; Rodriguez Lopez, J. A; Rodriguez Perez, P; Roiser, S; Romanovsky, V; Romero Vidal, A; Ronayne, J. W; Rotondo, M; Rouvinet, J; Ruf, T; Ruiz, H; Ruiz Valls, P; Saborido Silva, J. J; Sagidova, N; Sail, P; Saitta, B; Salustino Guimaraes, V; Sanchez Mayordomo, C; Sanmartin Sedes, B; Santacesaria, R; Santamarina Rios, C; Santimaria, M; Santovetti, E; Sarti, A; Satriano, C; Satta, A; Saunders, D. M; Savrina, D; Schiller, M; Schindler, H; Schlupp, M; Schmelling, M; Schmelzer, T; Schmidt, B; Schneider, O; Schopper, A; Schubiger, M; Schune, M. H; Schwemmer, R; Sciascia, B; Sciubba, A; Semennikov, A; Sepp, I; Serra, N; Serrano, J; Sestini, L; Seyfert, P; Shapkin, M; Shapoval, I; Shcheglov, Y; Shears, T; Shekhtman, L; Shevchenko, V; Shires, A; Silva Coutinho, R; Simi, G; Sirendi, M; Skidmore, N; Skillicorn, I; Skwarnicki, T; Smith, E; Smith, E; Smith, I. T; Smith, J; Smith, M; Snoek, H; Sokoloff, M. D; Soler, F. J. P; Souza, D; Souza De Paula, B; Spaan, B; Spradlin, P; Sridharan, S; Stagni, F; Stahl, M; Stahl, S; Steinkamp, O; Stenyakin, O; Sterpka, F; Stevenson, S; Stoica, S; Stone, S; Storaci, B; Stracka, S; Straticiuc, M; Straumann, U; Sun, L; Sutcliffe, W; Swientek, K; Swientek, S; Syropoulos, V; Szczekowski, M; Szczypka, P; Szumlak, T; T'Jampens, S; Tekampe, T; Teklishyn, M; Tellarini, G; Teubert, F; Thomas, C; Thomas, E; van Tilburg, J; Tisserand, V; Tobin, M; Todd, J; Tolk, S; Tomassetti, L; Tonelli, D; Topp Joergensen, S; Torr, N; Tournefier, E; Tourneur, S; Trabelsi, K; Tran, M. T; Tresch, M; Trisovic, A; Tsaregorodtsev, A; Tsopelas, P; Tuning, N; Ukleja, A; Ustyuzhanin, A; Uwer, U; Vacca, C; Vagnoni, V; Valenti, G; Vallier, A; Vazquez Gomez, R; Vazquez Regueiro, P; Vazquez Sierra, C; Vecchi, S; Velthuis, J. J; Veltri, M; Veneziano, G; Vesterinen, M; Viaud, B; Vieira, D; Vieites Diaz, M; Vilasis Cardona, X; Vollhardt, A; Volyanskyy, D; Voong, D; Vorobyev, A; Vorobyev, V; Voss, C; de Vries, J. A; Waldi, R; Wallace, C; Wallace, R; Walsh, J; Wandernoth, S; Wang, J; Ward, D. R; Watson, N. K; Websdale, D; Weiden, A; Whitehead, M; Wiedner, D; Wilkinson, G; Wilkinson, M; Williams, M; Williams, M. P; Williams, M; Williams, T; Wilson, F. F; Wimberley, J; Wishahi, J; Wislicki, W; Witek, M; Wormser, G; Wotton, S. A; Wright, S; Wyllie, K; Xie, Y; Xu, Z; Yang, Z; Yu, J; Yuan, X; Yushchenko, O; Zangoli, M; Zavertyaev, M; Zhang, L; Zhang, Y; Zhelezov, A; Zhokhov, A; Zhong, L.

doi:10.1103/PhysRevLett.115.112001

Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with Wmunu is reconstructed using muons with a transverse momentum, p_T, larger than 25GeV in the pseudorapidity range 2.0<eta<4.5. The b jets are required to have 50<p_T<100GeV and 2.2<eta<4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy p_T>20GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0fb^-1 collected at center-of-mass energies of 7 and 8TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are sigma(top)[7TeV]=239±53(stat)±33(syst)±24(theory)fb,sigma(top)[8TeV]=289 ±43(stat)±40(syst)±29(theory)fb.These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.

Titolo:	First Observation of Top Quark Production in the Forward Region
Autori:	Aaij, R Adeva, B Adinolfi, M Affolder, A Ajaltouni, Z Akar, S Albrecht, J Alessio, F Alexander, M Ali, S Alkhazov, G Alvarez Cartelle, P Alves, A. A Amato, S Amerio, S Amhis, Y An, L Anderlini, L Anderson, J Andreotti, M Andrews, J. E Appleby, R. B Aquines Gutierrez, O Archilli, F D'Argent, P Artamonov, A Artuso, M Aslanides, E Auriemma, G Baalouch, M Bachmann, S Back, J. J Badalov, A Baesso, C Baldini, W Barlow, R. J Barschel, C Barsuk, S Barter, W Batozskaya, V Battista, V Bay, A Beaucourt, L Beddow, J Bedeschi, F Bediaga, I Bel, L. J Belyaev, I Ben Haim, E Bencivenni, G Benson, S Benton, J Berezhnoy, A Bernet, R Bertolin, A Bettler, M. O van Beuzekom, M Bien, A Bifani, S Bird, T Birnkraut, A Bizzeti, A Blake, T Blanc, F Blouw, J Blusk, S Bocci, V Bondar, A Bondar, N Bonivento, W Borghi, S Borsato, M Bowcock, T. J. V Bowen, E Bozzi, C Braun, S Brett, D Britsch, M Britton, T Brodzicka, J Brook, N. H Bursche, A Buytaert, J Cadeddu, S Calabrese, R Calvi, M Calvo Gomez, M Campana, P Campora Perez, D Capriotti, L Carbone, A Carboni, G Cardinale, R Cardini, A Carniti, P Carson, L Carvalho Akiba, K Casse, G Cassina, L Castillo Garcia, L Cattaneo, M Cauet, Ch Cavallero, G CENCI, RICCARDO Charles, M Charpentier, Ph Chefdeville, M Chen, S Cheung, S. F Chiapolini, N Chrzaszcz, M Cid Vidal, X Ciezarek, G Clarke, P. E. L Clemencic, M Cliff, H. V Closier, J Coco, V Cogan, J Cogneras, E Cogoni, V Cojocariu, L Collazuol, G Collins, P Comerma Montells, A Contu, A Cook, A Coombes, M Coquereau, S Corti, G Corvo, M Couturier, B Cowan, G. A Craik, D. C Crocombe, A Cruz Torres, M Cunliffe, S Currie, R D'Ambrosio, C Dalseno, J David, P. N. Y Davis, A De Bruyn, K De Capua, S De Cian, M De Miranda, J. M De Paula, L De Silva, W De Simone, P Dean, C. T Decamp, D Deckenhoff, M Del Buono, L Deleage, N Demmer, M Derkach, D Deschamps, O Dettori, F Di Canto, A Di Ruscio, F Dijkstra, H Donleavy, S Dordei, F Dorigo, M Dosil Suarez, A Dossett, D Dovbnya, A Dreimanis, K Dufour, L Dujany, G Dupertuis, F Durante, P Dzhelyadin, R Dziurda, A Dzyuba, A Easo, S Egede, U Egorychev, V Eidelman, S Eisenhardt, S Eitschberger, U Ekelhof, R Eklund, L El Rifai, I Elsasser, Ch Ely, S Esen, S Evans, H. M Evans, T Falabella, A Farber, C Farinelli, C Farley, N Farry, S Fay, R Ferguson, D Fernandez Albor, V Ferrari, F Ferreira Rodrigues, F Ferro Luzzi, M Filippov, S Fiore, M Fiorini, M Firlej, M Fitzpatrick, C Fiutowski, T Fohl, K Fol, P Fontana, M Fontanelli, F Forty, R Francisco, O Frank, M Frei, C Frosini, M Fu, J Furfaro, E Gallas Torreira, A Galli, D Gallorini, S Gambetta, S Gandelman, M Gandini, P Gao, Y Garcia Pardinas, J Garofoli, J Garra Tico, J Garrido, L Gascon, D Gaspar, C Gastaldi, U Gauld, R Gavardi, L Gazzoni, G Geraci, A Gerick, D Gersabeck, E Gersabeck, M Gershon, T Ghez, Ph Gianelle, A Giani, S Gibson, V Girard, O. G Giubega, L Gligorov, V. V Gobel, C Golubkov, D Golutvin, A Gomes, A Gotti, C Grabalosa Gandara, M Graciani Diaz, R Granado Cardoso, L. A Grauges, E Graverini, E Graziani, G Grecu, A Greening, E Gregson, S Griffith, P Grillo, L Grunberg, O Gui, B Gushchin, E Guz, Yu Gys, T Hadavizadeh, T Hadjivasiliou, C Haefeli, G Haen, C Haines, S. C Hall, S Hamilton, B Hampson, T Han, X Hansmann Menzemer, S Harnew, N Harnew, S. T Harrison, J He, J Head, T Heijne, V Hennessy, K Henrard, P Henry, L Hernando Morata, J. A van Herwijnen, E Hess, M Hicheur, A Hill, D Hoballah, M Hombach, C Hulsbergen, W Humair, T Hussain, N Hutchcroft, D Hynds, D Idzik, M Ilten, P Jacobsson, R Jaeger, A Jalocha, J Jans, E Jawahery, A Jing, F John, M Johnson, D Jones, C. R Joram, C Jost, B Jurik, N Kandybei, S Kanso, W Karacson, M Karbach, T. M Karodia, S Kelsey, M Kenyon, I. R Kenzie, M Ketel, T Khanji, B Khurewathanakul, C Klaver, S Klimaszewski, K Kochebina, O Kolpin, M Komarov, I Koopman, R. F Koppenburg, P Korolev, M Kozeiha, M Kravchuk, L Kreplin, K Kreps, M Krocker, G Krokovny, P Kruse, F Kucewicz, W Kucharczyk, M Kudryavtsev, V Kuonen, A. K Kurek, K Kvaratskheliya, T La Thi, V. N Lacarrere, D Lafferty, G Lai, A Lambert, D Lambert, R. W Lanfranchi, G Langenbruch, C Langhans, B Latham, T Lazzeroni, C Le Gac, R van Leerdam, J Lees, J. P Lefevre, R Leflat, A Lefrancois, J Leroy, O Lesiak, T Leverington, B Li, Y Likhomanenko, T Liles, M Lindner, R Linn, C Lionetto, F Liu, B Liu, X Loh, D Lohn, S Longstaff, I Lopes, J. H Lucchesi, D Lucio Martinez, M Luo, H Lupato, A Luppi, E Lupton, O Machefert, F Maciuc, F Maev, O Maguire, K Malde, S Malinin, A Manca, G Mancinelli, G Manning, P Mapelli, A Maratas, J Marchand, J. F Marconi, U Marin Benito, C MARINO, PIETRO Marki, R Marks, J Martellotti, G Martin, M Martinelli, M Martinez Santos, D Martinez Vidal, F Martins Tostes, D Massafferri, A Matev, R Mathad, A Mathe, Z Matteuzzi, C Matthieu, K Mauri, A Maurin, B Mazurov, A Mccann, M Mccarthy, J Mcnab, A Mcnulty, R Meadows, B Meier, F Meissner, M Melnychuk, D Merk, M Milanes, D. A Minard, M. N Mitzel, D. S Molina Rodriguez, J Monteil, S Morandin, M Morawski, P Morda, A MORELLO, MICHAEL JOSEPH Moron, J Morris, A. B Mountain, R Muheim, F Muller, J Muller, K Muller, V Mussini, M Muster, B Naik, P Nakada, T Nandakumar, R Nandi, A Nasteva, I Needham, M Neri, N Neubert, S Neufeld, N Neuner, M Nguyen, A. D Nguyen, T. D Nguyen Mau, C Niess, V Niet, R Nikitin, N Nikodem, T Ninci, D Novoselov, A O'Hanlon, D. P Oblakowska Mucha, A Obraztsov, V Ogilvy, S Okhrimenko, O Oldeman, R Onderwater, C. J. G Osorio Rodrigues, B Otalora Goicochea, J. M Otto, A Owen, P Oyanguren, A Palano, A Palombo, F Palutan, M Panman, J Papanestis, A Pappagallo, M Pappalardo, L. L Pappenheimer, C Parkes, C Passaleva, G Patel, G. D Patel, M Patrignani, C Pearce, A Pellegrino, A Penso, G Pepe Altarelli, M Perazzini, S Perret, P Pescatore, L Petridis, K Petrolini, A Petruzzo, M Picatoste Olloqui, E Pietrzyk, B Pilar, T Pinci, D Pistone, A Piucci, A Playfer, S Plo Casasus, M Poikela, T Polci, F Poluektov, A Polyakov, I Polycarpo, E Popov, A Popov, D Popovici, B Potterat, C Price, E Price, J. D Prisciandaro, J Pritchard, A Prouve, C Pugatch, V Puig Navarro, A Punzi, G Qian, W Quagliani, R Rachwal, B Rademacker, J. H Rakotomiaramanana, B Rama, M Rangel, M. S Raniuk, I Rauschmayr, N Raven, G Redi, F Reichert, S Reid, M. M Dos Reis, A. C Ricciardi, S Richards, S Rihl, M Rinnert, K Rives Molina, V Robbe, P Rodrigues, A. B Rodrigues, E Rodriguez Lopez, J. A Rodriguez Perez, P Roiser, S Romanovsky, V Romero Vidal, A Ronayne, J. W Rotondo, M Rouvinet, J Ruf, T Ruiz, H Ruiz Valls, P Saborido Silva, J. J Sagidova, N Sail, P Saitta, B Salustino Guimaraes, V Sanchez Mayordomo, C Sanmartin Sedes, B Santacesaria, R Santamarina Rios, C Santimaria, M Santovetti, E Sarti, A Satriano, C Satta, A Saunders, D. M Savrina, D Schiller, M Schindler, H Schlupp, M Schmelling, M Schmelzer, T Schmidt, B Schneider, O Schopper, A Schubiger, M Schune, M. H Schwemmer, R Sciascia, B Sciubba, A Semennikov, A Sepp, I Serra, N Serrano, J Sestini, L Seyfert, P Shapkin, M Shapoval, I Shcheglov, Y Shears, T Shekhtman, L Shevchenko, V Shires, A Silva Coutinho, R Simi, G Sirendi, M Skidmore, N Skillicorn, I Skwarnicki, T Smith, E Smith, E Smith, I. T Smith, J Smith, M Snoek, H Sokoloff, M. D Soler, F. J. P Souza, D Souza De Paula, B Spaan, B Spradlin, P Sridharan, S Stagni, F Stahl, M Stahl, S Steinkamp, O Stenyakin, O Sterpka, F Stevenson, S Stoica, S Stone, S Storaci, B Stracka, S Straticiuc, M Straumann, U Sun, L Sutcliffe, W Swientek, K Swientek, S Syropoulos, V Szczekowski, M Szczypka, P Szumlak, T T'Jampens, S Tekampe, T Teklishyn, M Tellarini, G Teubert, F Thomas, C Thomas, E van Tilburg, J Tisserand, V Tobin, M Todd, J Tolk, S Tomassetti, L Tonelli, D Topp Joergensen, S Torr, N Tournefier, E Tourneur, S Trabelsi, K Tran, M. T Tresch, M Trisovic, A Tsaregorodtsev, A Tsopelas, P Tuning, N Ukleja, A Ustyuzhanin, A Uwer, U Vacca, C Vagnoni, V Valenti, G Vallier, A Vazquez Gomez, R Vazquez Regueiro, P Vazquez Sierra, C Vecchi, S Velthuis, J. J Veltri, M Veneziano, G Vesterinen, M Viaud, B Vieira, D Vieites Diaz, M Vilasis Cardona, X Vollhardt, A Volyanskyy, D Voong, D Vorobyev, A Vorobyev, V Voss, C de Vries, J. A Waldi, R Wallace, C Wallace, R Walsh, J Wandernoth, S Wang, J Ward, D. R Watson, N. K Websdale, D Weiden, A Whitehead, M Wiedner, D Wilkinson, G Wilkinson, M Williams, M Williams, M. P Williams, M Williams, T Wilson, F. F Wimberley, J Wishahi, J Wislicki, W Witek, M Wormser, G Wotton, S. A Wright, S Wyllie, K Xie, Y Xu, Z Yang, Z Yu, J Yuan, X Yushchenko, O Zangoli, M Zavertyaev, M Zhang, L Zhang, Y Zhelezov, A Zhokhov, A Zhong, L. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2015
Rivista:	PHYSICAL REVIEW LETTERS
Abstract:	Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with Wmunu is reconstructed using muons with a transverse momentum, p_T, larger than 25GeV in the pseudorapidity range 2.0<eta<4.5. The b jets are required to have 50<p_T<100GeV and 2.2<eta<4.2, while the transverse component of the sum of the muon and b-jet momenta must satisfy p_T>20GeV. The results are based on data corresponding to integrated luminosities of 1.0 and 2.0fb^-1 collected at center-of-mass energies of 7 and 8TeV by LHCb. The inclusive top quark production cross sections in the fiducial region are sigma(top)[7TeV]=239±53(stat)±33(syst)±24(theory)fb,sigma(top)[8TeV]=289 ±43(stat)±40(syst)±29(theory)fb.These results, along with the observed differential yields and charge asymmetries, are in agreement with next-to-leading order standard model predictions.
Handle:	http://hdl.handle.net/11384/59690
Appare nelle tipologie:	1.1 Articolo in rivista

File in questo prodotto:

Non ci sono file associati a questo prodotto.

Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/11384/59690

Citazioni

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

CINECA IRIS Institutional Research Information System

File in questo prodotto: