Production of chi(c1) and chi(c2) in pp collisions at sqrt[S] = 1.8 TeV

T Affolder; H Akimoto; A Akopian; M G Albrow; P Amaral; S R Amendolia; D Amidei; K Anikeev; J Antos; G Apollinari; T Arisawa; T Asakawa; W Ashmanskas; F Azfar; P Azzi-Bacchetta; N Bacchetta; M W Bailey; S Bailey; P de Barbaro; A Barbaro-Galtieri; V E Barnes; B A Barnett; S Baroiant; M Barone; G Bauer; F Bedeschi; S Belforte; W H Bell; G Bellettini; J Bellinger; D Benjamin; J Bensinger; A Beretvas; J P Berge; J Berryhill; B Bevensee; A Bhatti; M Binkley; D Bisello; M Bishai; R E Blair; C Blocker; K Bloom; B Blumenfeld; S R Blusk; A Bocci; A Bodek; W Bokhari; G Bolla; Y Bonushkin; D Bortoletto; J Boudreau; A Brandl; S van den Brink; C Bromberg; M Brozovic; N Bruner; E Buckley-Geer; J Budagov; H S Budd; K Burkett; G Busetto; A Byon-Wagner; K L Byrum; P Calafiura; M Campbell; W Carithers; J Carlson; D Carlsmith; W Caskey; J Cassada; A Castro; D Cauz; A Cerri; A W Chan; P S Chang; P T Chang; J Chapman; C Chen; Y C Chen; M T Cheng; M Chertok; G Chiarelli; I Chirikov-Zorin; G Chlachidze; F Chlebana; L Christofek; M L Chu; Y S Chung; C I Ciobanu; A G Clark; A Connolly; J Conway; M Cordelli; J Cranshaw; D Cronin-Hennessy; R Cropp; R Culbertson; D Dagenhart; S D'Auria; F DeJongh; S Dell'Agnello; M Dell'Orso; L Demortier; M Deninno; P F Derwent; T Devlin; J R Dittmann; S Donati; J Done; T Dorigo; N Eddy; K Einsweiler; J E Elias; E Engels Jr; R Erbacher; D Errede; S Errede; Q Fan; R G Feild; J P Fernandez; C Ferretti; R D Field; I Fiori; B Flaugher; G W Foster; M Franklin; J Freeman; J Friedman; Y Fukui; I Furic; S Galeotti; M Gallinaro; T Gao; M Garcia-Sciveres; A F Garfinkel; P Gatti; C Gay; D W Gerdes; P Giannetti; P Giromini; V Glagolev; D Glenzinski; M Gold; J Goldstein; A Gordon; I Gorelov; A T Goshaw; Y Gotra; K Goulianos; C Green; G Grim; P Gris; L Groer; C Grosso-Pilcher; M Guenther; G Guillian; J Guimaraes da Costa; R M Haas; C Haber; E Hafen; S R Hahn; C Hall; T Handa; R Handler; W Hao; F Happacher; K Hara; A D Hardman; R M Harris; F Hartmann; K Hatakeyama; J Hauser; J Heinrich; A Heiss; M Herndon; C Hill; K D Hoffman; C Holck; R Hollebeek; L Holloway; R Hughes; J Huston; J Huth; H Ikeda; J Incandela; G Introzzi; J Iwai; Y Iwata; E James; H Jensen; M Jones; U Joshi; H Kambara; T Kamon; T Kaneko; K Karr; H Kasha; Y Kato; T A Keaffaber; K Kelley; M Kelly; R D Kennedy; R Kephart; D Khazins; T Kikuchi; B Kilminster; B J Kim; D H Kim; H S Kim; M J Kim; S H Kim; Y K Kim; M Kirby; M Kirk; L Kirsch; S Klimenko; P Koehn; A Köngeter; K Kondo; J Konigsberg; K Kordas; A Korn; A Korytov; E Kovacs; J Kroll; M Kruse; S E Kuhlmann; K Kurino; T Kuwabara; A T Laasanen; N Lai; S Lami; S Lammel; J I Lamoureux; J Lancaster; M Lancaster; R Lander; G Latino; T LeCompte; A M Lee 4th; K Lee; S Leone; J D Lewis; M Lindgren; T M Liss; J B Liu; Y C Liu; N Lockyer; J Loken; M Loreti; D Lucchesi; P Lukens; S Lusin; L Lyons; J Lys; R Madrak; K Maeshima; P Maksimovic; L Malferrari; M Mangano; M Mariotti; G Martignon; A Martin; J A Matthews; J Mayer; P Mazzanti; K S McFarland; P McIntyre; E McKigney; M Menguzzato; A Menzione; C Mesropian; A Meyer; T Miao; R Miller; J S Miller; H Minato; S Miscetti; M Mishina; G Mitselmakher; N Moggi; E Moore; R Moore; Y Morita; T Moulik; M Mulhearn; A Mukherjee; T Muller; A Munar; P Murat; S Murgia; J Nachtman; S Nahn; H Nakada; T Nakaya; I Nakano; C Nelson; T Nelson; C Neu; D Neuberger; C Newman-Holmes; C Y Ngan; H Niu; L Nodulman; A Nomerotski; S H Oh; T Ohmoto; T Ohsugi; R Oishi; T Okusawa; J Olsen; W Orejudos; C Pagliarone; F Palmonari; R Paoletti; V Papadimitriou; S P Pappas; D Partos; J Patrick; G Pauletta; M Paulini; C Paus; L Pescara; T J Phillips; G Piacentino; K T Pitts; A Pompos; L Pondrom; G Pope; M Popovic; F Prokoshin; J Proudfoot; F Ptohos; O Pukhov; G Punzi; K Ragan; A Rakitine; D Reher; A Reichold; A Ribon; W Riegler; F Rimondi; L Ristori; M Riveline; W J Robertson; A Robinson; T Rodrigo; S Rolli; L Rosenson; R Roser; R Rossin; A Roy; A Safonov; R St  Denis; W K Sakumoto; D Saltzberg; C Sanchez; A Sansoni; L Santi; H Sato; P Savard; P Schlabach; E E Schmidt; M P Schmidt; M Schmitt; L Scodellaro; A Scott; A Scribano; S Segler; S Seidel; Y Seiya; A Semenov; F Semeria; T Shah; M D Shapiro; P F Shepard; T Shibayama; M Shimojima; M Shochet; J Siegrist; G Signorelli; A Sill; P Sinervo; P Singh; A J Slaughter; K Sliwa; C Smith; F D Snider; A Solodsky; J Spalding; T Speer; P Sphicas; F Spinella; M Spiropulu; L Spiegel; J Steele; A Stefanini; J Strologas; F Strumia; D Stuart; K Sumorok; T Suzuki; T Takano; R Takashima; K Takikawa; P Tamburello; M Tanaka; B Tannenbaum; W Taylor; M Tecchio; R Tesarek; P K Teng; K Terashi; S Tether; A S Thompson; R Thurman-Keup; P Tipton; S Tkaczyk; K Tollefson; A Tollestrup; H Toyoda; W Trischuk; J F de Troconiz; J Tseng; N Turini; F Ukegawa; T Vaiciulis; J Valls; S Vejcik 3rd; G Velev; R Vidal; R Vilar; I Volobouev; D Vucinic; R G Wagner; R L Wagner; J Wahl; N B Wallace; A M Walsh; C Wang; M J Wang; T Watanabe; D Waters; T Watts; R Webb; H Wenzel; W C Wester 3rd; A B Wicklund; E Wicklund; T Wilkes; H H Williams; P Wilson; B L Winer; D Winn; S Wolbers; D Wolinski; J Wolinski; S Wolinski; S Worm; X Wu; J Wyss; A Yagil; W Yao; G P Yeh; P Yeh; J Yoh; C Yosef; T Yoshida; I Yu; S Yu; Z Yu; A Zanetti; F Zetti; S Zucchelli; CDF Collaboration

doi:10.1103/PhysRevLett.86.3963

Production of chi(c1) and chi(c2) in pp collisions at sqrt[S] = 1.8 TeV

Phys Rev Lett. 2001 Apr 30;86(18):3963-8. doi: 10.1103/PhysRevLett.86.3963.

Authors

T Affolder¹, H Akimoto, A Akopian, M G Albrow, P Amaral, S R Amendolia, D Amidei, K Anikeev, J Antos, G Apollinari, T Arisawa, T Asakawa, W Ashmanskas, F Azfar, P Azzi-Bacchetta, N Bacchetta, M W Bailey, S Bailey, P de Barbaro, A Barbaro-Galtieri, V E Barnes, B A Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Belforte, W H Bell, G Bellettini, J Bellinger, D Benjamin, J Bensinger, A Beretvas, J P Berge, J Berryhill, B Bevensee, A Bhatti, M Binkley, D Bisello, M Bishai, R E Blair, C Blocker, K Bloom, B Blumenfeld, S R Blusk, A Bocci, A Bodek, W Bokhari, G Bolla, Y Bonushkin, D Bortoletto, J Boudreau, A Brandl, S van den Brink, C Bromberg, M Brozovic, N Bruner, E Buckley-Geer, J Budagov, H S Budd, K Burkett, G Busetto, A Byon-Wagner, K L Byrum, P Calafiura, M Campbell, W Carithers, J Carlson, D Carlsmith, W Caskey, J Cassada, A Castro, D Cauz, A Cerri, A W Chan, P S Chang, P T Chang, J Chapman, C Chen, Y C Chen, M T Cheng, M Chertok, G Chiarelli, I Chirikov-Zorin, G Chlachidze, F Chlebana, L Christofek, M L Chu, Y S Chung, C I Ciobanu, A G Clark, A Connolly, J Conway, M Cordelli, J Cranshaw, D Cronin-Hennessy, R Cropp, R Culbertson, D Dagenhart, S D'Auria, F DeJongh, S Dell'Agnello, M Dell'Orso, L Demortier, M Deninno, P F Derwent, T Devlin, J R Dittmann, S Donati, J Done, T Dorigo, N Eddy, K Einsweiler, J E Elias, E Engels Jr, R Erbacher, D Errede, S Errede, Q Fan, R G Feild, J P Fernandez, C Ferretti, R D Field, I Fiori, B Flaugher, G W Foster, M Franklin, J Freeman, J Friedman, Y Fukui, I Furic, S Galeotti, M Gallinaro, T Gao, M Garcia-Sciveres, A F Garfinkel, P Gatti, C Gay, D W Gerdes, P Giannetti, P Giromini, V Glagolev, D Glenzinski, M Gold, J Goldstein, A Gordon, I Gorelov, A T Goshaw, Y Gotra, K Goulianos, C Green, G Grim, P Gris, L Groer, C Grosso-Pilcher, M Guenther, G Guillian, J Guimaraes da Costa, R M Haas, C Haber, E Hafen, S R Hahn, C Hall, T Handa, R Handler, W Hao, F Happacher, K Hara, A D Hardman, R M Harris, F Hartmann, K Hatakeyama, J Hauser, J Heinrich, A Heiss, M Herndon, C Hill, K D Hoffman, C Holck, R Hollebeek, L Holloway, R Hughes, J Huston, J Huth, H Ikeda, J Incandela, G Introzzi, J Iwai, Y Iwata, E James, H Jensen, M Jones, U Joshi, H Kambara, T Kamon, T Kaneko, K Karr, H Kasha, Y Kato, T A Keaffaber, K Kelley, M Kelly, R D Kennedy, R Kephart, D Khazins, T Kikuchi, B Kilminster, B J Kim, D H Kim, H S Kim, M J Kim, S H Kim, Y K Kim, M Kirby, M Kirk, L Kirsch, S Klimenko, P Koehn, A Köngeter, K Kondo, J Konigsberg, K Kordas, A Korn, A Korytov, E Kovacs, J Kroll, M Kruse, S E Kuhlmann, K Kurino, T Kuwabara, A T Laasanen, N Lai, S Lami, S Lammel, J I Lamoureux, J Lancaster, M Lancaster, R Lander, G Latino, T LeCompte, A M Lee 4th, K Lee, S Leone, J D Lewis, M Lindgren, T M Liss, J B Liu, Y C Liu, N Lockyer, J Loken, M Loreti, D Lucchesi, P Lukens, S Lusin, L Lyons, J Lys, R Madrak, K Maeshima, P Maksimovic, L Malferrari, M Mangano, M Mariotti, G Martignon, A Martin, J A Matthews, J Mayer, P Mazzanti, K S McFarland, P McIntyre, E McKigney, M Menguzzato, A Menzione, C Mesropian, A Meyer, T Miao, R Miller, J S Miller, H Minato, S Miscetti, M Mishina, G Mitselmakher, N Moggi, E Moore, R Moore, Y Morita, T Moulik, M Mulhearn, A Mukherjee, T Muller, A Munar, P Murat, S Murgia, J Nachtman, S Nahn, H Nakada, T Nakaya, I Nakano, C Nelson, T Nelson, C Neu, D Neuberger, C Newman-Holmes, C Y Ngan, H Niu, L Nodulman, A Nomerotski, S H Oh, T Ohmoto, T Ohsugi, R Oishi, T Okusawa, J Olsen, W Orejudos, C Pagliarone, F Palmonari, R Paoletti, V Papadimitriou, S P Pappas, D Partos, J Patrick, G Pauletta, M Paulini, C Paus, L Pescara, T J Phillips, G Piacentino, K T Pitts, A Pompos, L Pondrom, G Pope, M Popovic, F Prokoshin, J Proudfoot, F Ptohos, O Pukhov, G Punzi, K Ragan, A Rakitine, D Reher, A Reichold, A Ribon, W Riegler, F Rimondi, L Ristori, M Riveline, W J Robertson, A Robinson, T Rodrigo, S Rolli, L Rosenson, R Roser, R Rossin, A Roy, A Safonov, R St Denis, W K Sakumoto, D Saltzberg, C Sanchez, A Sansoni, L Santi, H Sato, P Savard, P Schlabach, E E Schmidt, M P Schmidt, M Schmitt, L Scodellaro, A Scott, A Scribano, S Segler, S Seidel, Y Seiya, A Semenov, F Semeria, T Shah, M D Shapiro, P F Shepard, T Shibayama, M Shimojima, M Shochet, J Siegrist, G Signorelli, A Sill, P Sinervo, P Singh, A J Slaughter, K Sliwa, C Smith, F D Snider, A Solodsky, J Spalding, T Speer, P Sphicas, F Spinella, M Spiropulu, L Spiegel, J Steele, A Stefanini, J Strologas, F Strumia, D Stuart, K Sumorok, T Suzuki, T Takano, R Takashima, K Takikawa, P Tamburello, M Tanaka, B Tannenbaum, W Taylor, M Tecchio, R Tesarek, P K Teng, K Terashi, S Tether, A S Thompson, R Thurman-Keup, P Tipton, S Tkaczyk, K Tollefson, A Tollestrup, H Toyoda, W Trischuk, J F de Troconiz, J Tseng, N Turini, F Ukegawa, T Vaiciulis, J Valls, S Vejcik 3rd, G Velev, R Vidal, R Vilar, I Volobouev, D Vucinic, R G Wagner, R L Wagner, J Wahl, N B Wallace, A M Walsh, C Wang, M J Wang, T Watanabe, D Waters, T Watts, R Webb, H Wenzel, W C Wester 3rd, A B Wicklund, E Wicklund, T Wilkes, H H Williams, P Wilson, B L Winer, D Winn, S Wolbers, D Wolinski, J Wolinski, S Wolinski, S Worm, X Wu, J Wyss, A Yagil, W Yao, G P Yeh, P Yeh, J Yoh, C Yosef, T Yoshida, I Yu, S Yu, Z Yu, A Zanetti, F Zetti, S Zucchelli; CDF Collaboration

Affiliation

¹ Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.

PMID: 11328071
DOI: 10.1103/PhysRevLett.86.3963

Abstract

We have measured the ratio of prompt production rates of the charmonium states chi(c1) and chi(c2) in 110 pb(-1) of pp collisions at sqrt[s] = 1.8 TeV. The photon from their decay into J/psi(gamma) is reconstructed through conversion into e+e- pairs. The energy resolution this technique provides makes the resolution of the two states possible. We find the ratio of production cross sections sigma(chi(c2))/sigma(chi(c1)) = 0.96+/-0.27(stat)+/-0.11(syst) for events with pT(J/psi) > 4.0 GeV/c, /eta(J/psi)/ < 0.6, and pT(gamma) > 1.0 GeV/c.