Bose-Einstein correlations of same-sign charged pions in the forward region in pp collisions at root s=7 TeV

Aaij, R; Adeva, B; Adinolfi, M; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Albero, Aa; Ali, S; Alkhazov, G; Cartelle, Pa; Alves, Aa; J, R; Amato, S; Amerio, S; Amhis, Y; An, L; Anderlini, L; Andreassi, G; Andreotti, M; Andrews, Je; Appleby, Rb; Archilli, F; D'Argent, P; Romeu, Ja; Artamonov, A; Artuso, M; Aslanides, E; Auriemma, G; Baalouch, M; Babuschkin, I; Bachmann, S; Back, Jj; Badalov, A; Baesso, C; Baker, S; Balagura, V; Baldini, W; Baranov, A; Barlow, Rj; Barsche, C; Barsuk, S; Barter, W; Baryshnikov, F; Batozskaya, V; Battista, V; Bay, A; Beaucourt, L; Beddow, J; Bedeschi, F; Bediagal, I; Beiter, A; L. J., B; Beliy, N; Bellee, V; Belloli, N; Belous, K; Belyaev, I; Ben-Haim, E; Bencivenni, G; Benson, S; Beranek, S; Berezhnoy, A; Bernet, R; Berninghoff, D; Bertholet, E; Bertolin, A; Betancourt, C; Betti, F; Bettler, M-; van Beuzekom, M; Bershyiko, I; Bifani, S; Billoir, P; Birnkraut, A; Bitadze, A; Bizzeti, A; Bjorn, M; Blake, T; Blanc, F; Blouw, J; Blusk, S; Bocci, V; Boettcher, T; Bondar, A; Bondar, N; Bonivento, W; Bordyuzhin, I; Borgheresi, A; Borghi, S; Borisyak, M; Borsato, M; Bossu, F; Boubdir, M; Bowcock, Tjv; Bowen, E; Bozzi, C; Braun, S; Britton, T; Brodzicka, J; Brundu, D; Buchanan, E; Burr, C; Bursche, A; Buytaert, J; Byczynski, W; Cadeddu, S; Cai, H; Calabrese, R; Calladine, R; Calvi, M; Gomez, Mc; Camboni, A; Campana, P; Perez, Dhc; Capriotti, L; Carbone, A; Carboni, G; Cardinale, R; Cardini, A; Carniti, P; Carson, L; Akiba, Kc; Casse, G; Cassina, L; Garcia, Lc; Cattaneo, M; Cavallero, G; Cenci, R; Chamont, D; Charles, M; Charpentier, P; Chatzikonstantinidis, G; Chefdeville, M; Chen, S; Cheung, Sf; Chitic, S-; Chobanova, V; Chrzaszcz, M; Chubykin, A; Ciambrone, P; Vidal, Xc; Ciezarek, G; Clarke, Pel; Clemencic, M; Cliff, Hv; Closier, J; Cogan, J; Cogneras, E; Cogoni, V; Cojocariu, L; Collins, P; Colombo, T; Comerma-Montells, A; Contu, A; Cook, A; Coombs, G; Coquereau, S; Corti, G; Corvo, M; Sobra, Cmc; Couturier, B; Cowan, Ga; Craik, Dc; Crocombe, A; Torres, Mc; Currie, R; D'Ambrosio, C; Marinho, Fdc; Dall'Occo, E; Dalseno, J; Davis, A; Francisco, Oda; De Capua, S; De Cian, M; De Mirandal, Jm; De Paula, L; De Serio, M; De Simone, P; Dean, Ct; Decamp, D; Del Buono, L; Dembinskill, H-; Demmer, M; Dendek, A; Derkach, D; Deschamps, O; Dettori, F; Dey, B; Di Canto, A; Di Nezza, P; Dijkstra, H; Dordei, F; Dorigo, M; Suarez, Ad; Douglas, L; Dovbnya, A; Dreimanis, K; Dufour, L; Dujany, G; Durante, P; Dzhelyadin, R; Dziewiecki, M; Dziurda, A; Dzyuba, A; Easo, S; Ebert, M; Egede, U; Egorychev, V; Eidelman, S; Eisenhardt, S; Eitschberger, U; Ekelhof, R; Eklund, L; Ely, S; Esen, S; Evans, Hm; Evans, T; Falabella, A; Farley, N; Farry, S; Fazzini, D; Federici, L; Ferguson, D; Fernandez, G; Declara, Pf; Prieto, Af; Ferrari, F; Rodrigues, Ff; Ferro-Luzzi, M; Filippov, S; Fini, Ra; Fiore, M; Fiorini, M; Firlej, M; Fitzpatrick, C; Fiutowski, T; Fleuret, F; Foh, K; Fontana, M; Fontanelli, F; Forshaw, Dc; Forty, R; Lima, Vf; Frank, M; Frei, C; Fu, J; Funk, W; Furfaro, E; Farber, C; Gabriel, E; Torreira, Ag; Galli, D; Gallorini, S; Gambetta, S; Gandelman, M; Gandini, P; Gao, Y; Martin, Lmg; Pardinas, Jg; Tico, Jg; Garrido, L; Garsed, Pj; Gascon, D; Gaspar, C; Gavardil, L; Gazzoni, G; Gerick, D; Gersabeck, E; Gersabeck, M; Gershon, T; Ghez, P; Giani, S; Gibson, V; Girard, Og; Giubega, L; Gizdov, K; Gligorov, Vv; Golubkov, D; Golutvin, A; Gomes, A; Gorelov, Iv; Gotti, C; Govorkova, E; Grabowski, Jp; Diaz, Rg; Cardoso, Lag; Grauges, E; Graverini, E; Graziani, G; Grecu, A; Greim, R; Griffith, P; Grillo, L; Gruber, L; Cazon, Brg; Grunberg, O; Gushchin, E; Guz, Y; Gys, T; Gobel, C; Hadavizadeh, T; Hadjivasiliou, C; Haefeli, G; Haen, C; Haines, Sc; Hamilton, B; Han, X; Hancock, Th; Hansmann-Menzemer, S; Harnew, N; Harnew, St; Harrison, J; Hasse, C; Hatch, M; He, J; Hecker, M; Heinickel, K; Heister, A; Hennessy, K; Henrard, P; Henry, L; van Herwijnen, E; Hess, M; Hicheur, A; Hill, D; Hombach, C; Hopchev, Ph; Huard, Zc; Hulsbergen, W; Humair, T; Hushchyn, M; Hutchcroft, D; Ibis, P; Idzik, M; Ilten, P; Jacobsson, R; Jalocha, J; Jans, E; Jawahery, A; Jezabek, M; Jiang, F; John, M; Johnson, D; Jones, Cr; Joram, C; Jost, B; Jurik, N; Kandybei, S; Karacson, M; Kariuki, Jm; Karodia, S; Kazeev, N; Kecke, M; Kelsey, M; Kenzie, M; Ketel, T; Khairullin, E; Khanji, B; Khurewathanaku, C; Kirn, T; Klaver, S; Klimaszewski, K; Klimkovichll, T; Koliiev, S; Kolpin, M; Komarov, I; Kopecna, R; Koppenburg, P; Kosmyntseva, A; Kotriakhova, S; Kozeiha, M; Kravchuk, L; Kreps, M; Krokovny, P; Kruse, F; Krzemien, W; Kucewicz, W; Kucharczyk, M; Kudryavtsev, V; Kuonen, Ak; Kurek, K; Kvaratskheliya, T; Lacarrere, D; Lafferty, G; Lai, A; Lanfranchi, G; Langenbruch, C; Latham, T; Lazzeroni, C; Le Gac, R; Leflat, A; Lefrancois, J; Lefevre, R; Lemaitre, F; Cid, El; Leroy, O; Lesiak, T; Leverington, B; P. -R., L; Li, T; Li, Y; Li, Z; Likhomanenko, T; Lindner, R; Lionetto, F; Lisovskyi, V; Liu, X; Loh, D; Loi, A; Longstaff, I; Lopes, Jh; Lucchesi, D; Martinez, Ml; Luo, H; Lupato, A; Luppi, E; Lupton, O; Lusiani, A; Lyu, X; Machefert, F; Maciuc, F; Macko, V; Mackowiak, P; Maddrell-Mander, S; Maev, O; Maguire, K; Maisuzenko, D; Majewski, Mw; Malde, S; Malecki, B; Malinin, A; Maltsev, T; Manca, G; Mancinelli, G; Manning, P; Marangotto, D; Maratas, J; Marchand, Jf; Marconi, U; Benito, Cm; Marinangeli, M; Marino, P; Marks, J; Martellotti, G; Martin, M; Martinelli, M; Santos, Dm; Vidal, Fm; Tostes, Dm; Massacrier, Lm; Massafferri, A; Matev, R; Mathad, A; Mathe, Z; Matteuzzi, C; Mauri, A; Maurice, E; Maurin, B; Mazurov, A; Mccann, M; Mcnab, A; Mcnulty, R; Mead, Jv; Meadows, B; Meaux, C; Meier, F; Meinert, N; Melnychuk, D; Merk, M; Merli, A; Michielin, E; Milanes, Da; Millard, E; Minard, Mn; Minzoni, L; Mitzel, Ds; Mogini, A; Rodriguezl, Jm; Mombacher, T; Monroy, Ia; Monteil, S; Morandin, M; Morello, Mj; Morgunova, O; Moron, J; Morris, Ab; Mountain, R; Muheim, F; Mulder, M; Mueller, D; Mueller, J; Mueller, K; Mueller, V; Naik, P; Nakada, T; Nandakumar, R; Nandi, A; Nasteva, I; Needham, M; Neri, N; Neubert, S; Neufeld, N; Neuner, M; Nguyen, Td; Nguyen-Mau, C; Nieswand, S; Niet, R; Nikitin, N; Nikodem, T; Nogay, A; O'Hanlon, Dp; Oblakowska-Mucha, A; Obraztsov, V; Ogilvy, S; Oldeman, R; Onderwater, Cjg; Ossowska, A; Goicochea, Jmo; Owen, P; Oyanguren, A; Pais, Pr; Palano, A; Palutan, M; Papanestis, A; Pappagallo, M; Pappalardo, Ll; Parker, W; Parkes, C; Passaleva, G; Pastore, A; Patel, M; Patrignani, C; Pearce, A; Pellegrino, A; Penso, G; Altarelli, Mp; Perazzini, S; Perret, P; Pescatore, L; Petridis, K; Petrolini, A; Petrov, A; Petruzzo, M; Oqui, Ep; Pietrzyk, B; Pikies, M; Pinci, D; Pisani, F; Pistone, A; Piucci, A; Placinta, V; Playfer, S; Casasus, Mp; Polci, F; Lener, Mp; Poluektov, A; Polyakov, I; Polycarpo, E; Pomery, Gj; Ponce, S; Popov, A; Popov, D; Poslayskii, S; Potterat, C; Price, E; Prisciandaro, J; Prouve, C; Pugatch, V; Navarro, Ap; Pullen, H; Punzi, G; Qian, W; Quagliani, R; Quintana, B; Rachwal, B; Rademacker, Jh; Rama, M; Pernas, Mr; Rangel, Ms; Raniuk, I; Ratnikov, F; Raven, G; Salzgeber, Mr; Reboud, M; Redi, F; Reichert, S; dos Reis, Ac; Alepuz, Cr; Renaudin, V; Ricciardi, S; Richards, S; Rihl, M; Rinnert, K; Molina, Vr; Robbe, P; Robert, A; Rodrigues, Ab; Rodrigues, E; Lopez, Jar; Perez, Pr; Rogozhnikov, A; Roiser, S; Rollings, A; Romanovskiy, V; Vidal, Ar; Ronayne, Jw; Rotondo, M; Rudolph, Ms; Ruf, T; Valls, Pr; Vidal, Jr; Silva, Jjs; Sadykhov, E; Sagidova, N; Saitta, B; Guimaraes, Vs; Mayordomo, Cs; Sedes, Bs; Santacesaria, R; Rios, Cs; Santimaria, M; Santovetti, E; Sarpis, G; Sarti, A; Satriano, C; Satta, A; Saunders, Dm; Savrina, D; Schael, S; Schellenberg, M; Schiller, M; Schindler, H; Schlupp, M; Schmelling, M; Schmelzerl, T; Schmidt, B; Schneider, O; Schopper, A; Schreiner, Hf; Schubert, K; Schubiger, M; Schune, M-; Schwemmer, R; Sciascia, B; Sciubba, A; Sernennikov, A; Sepulveda, Es; Sergi, A; Serra, N; Serrano, J; Sestini, L; Seyfert, P; Shapkin, M; Shapoval, I; Shcheglov, Y; Shears, T; Shekhtman, L; Shevchenko, V; Siddi, Bg; Coutinho, Rs; de Oliveira, Ls; Simi, G; Simone, S; Sirendi, M; Skidmore, N; Skwarnicki, T; Smith, E; Smith, It; Smith, J; Smith, M; Lavra, Os; Sokoloff, Md; Soler, Fjp; De Paula, Bs; Spaan, B; Spradlin, P; Sridharan, S; Stagni, F; Stahl, M; Stahl, S; Stefko, P; Stefkova, S; Steinkamp, O; Stemmle, S; Stenyakin, O; Stepanova, M; Stevens, H; Stone, S; Storaci, B; Stracka, S; Stramaglia, Me; Straticiuc, M; Straumann, U; Sun, J; Sun, L; Sutcliffe, W; Swientek, K; Syropoulos, V; Szczekowski, M; Szumlak, T; Szymanski, M; T'Jampens, S; Tayduganov, A; Tekampe, T; Tellarini, G; Teubert, F; Thomas, E; van Tilburg, J; Tilley, Mj; Tisserand, V; Tobin, M; Tolk, S; Tomassetti, L; Tonelli, D; Toriello, F; Aoude, Rtj; Tournefier, E; Traill, M; Tran, Mt; Tresch, M; Trisovic, A; Tsaregorodtsev, A; Tsopelas, P; Tully, A; Tuning, N; Ukleja, A; Usachov, A; Ustyuzhanin, A; Uwer, U; Vacca, C; Vagner, A; Vagnoni, V; Valassi, A; Valat, S; Valenti, G; Gomez, Rv; Regueiro, Pv; Vecchi, S; Van Veghel, M; Velthuis, Jj; Veltri, M; Veneziano, G; Venkateswaran, A; Verlage, Ta; Vernet, M; Vesterinen, M; Barbosa, Jvv; Viaud, B; Vieira, D; Diaz, Mv; Viemann, H; Vilasis-Cardona, X; Vitti, M; Volkov, V; Vollhardt, A; Voneki, B; Vorobyev, A; Vorobyev, V; Voss, C; de Vries, Ja; Sierra, Cv; Waldi, R; Wallace, C; Wallace, R; Walsh, J; Wang, J; Ward, Dr; Wark, Hm; Watson, Nk; Websdale, D; Weiden, A; Whitehead, M; Wicht, J; Wilkinson, G; Wilkinson, M; Williams, M; Williams, Mp; Williams, M; Williams, T; Wilson, Ff; Wimberley, J; Winn, M; Wishahi, J; Wislicki, W; Witek, M; Wormser, G; Wotton, Sa; Wraight, K; Wyllie, K; Xie, Y; Xu, Z; Yang, Z; Yang, Z; Yao, Y; Yin, H; Yu, J; Yuan, X; Yushchenko, O; Zarebski, Ka; Zavertyaev, M; Zhang, L; Zhang, Y; Zhelezov, A; Zheng, Y; Zhu, X; Zhukov, V; Zonneveld, Jb; Zucchelli, S

doi:10.1007/JHEP12(2017)025

Bose-Einstein correlations of same-sign charged pions, produced in proton-proton collisions at a 7TeV centre-of-mass energy, are studied using a data sample collected by the LHCb experiment. The signature for Bose-Einstein correlations is observed in the form of an enhancement of pairs of like-sign charged pions with small four-momentum difference squared. The charged-particle multiplicity dependence of the Bose-Einstein correlation parameters describing the correlation strength and the size of the emitting source is investigated, determining both the correlation radius and the chaoticity parameter. The measured correlation radius is found to increase as a function of increasing charged-particle multiplicity, while the chaoticity parameter is seen to decrease.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2017). Bose-Einstein correlations of same-sign charged pions in the forward region in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS(12) [10.1007/JHEP12(2017)025].