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Comparison of three-jet events in pp¯ collisions at s=1.8 TeV to predictions from a next-to-leading order QCD calculation

Physical Review D American Physical Society (APS) 71:3 (2005) 032002

Authors:

D Acosta, T Affolder, MG Albrow, D Ambrose, D Amidei, K Anikeev, J Antos, G Apollinari, T Arisawa, A Artikov, W Ashmanskas, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, WH Bell, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, G Bolla, A Bolshov, D Bortoletto, J Boudreau, C Bromberg, E Brubaker, J Budagov, HS Budd, K Burkett, G Busetto, KL Byrum, S Cabrera, M Campbell, W Carithers, D Carlsmith, A Castro, D Cauz, A Cerri, L Cerrito, J Chapman, C Chen, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, ML Chu, JY Chung, W-H Chung, YS Chung, CI Ciobanu, AG Clark, M Coca, A Connolly, M Convery, J Conway, M Cordelli, J Cranshaw, R Culbertson, D Dagenhart, S D’Auria, P de Barbaro, S De Cecco, S Dell’Agnello, M Dell’Orso, S Demers, L Demortier, M Deninno, D De Pedis, PF Derwent, C Dionisi, JR Dittmann, A Dominguez, S Donati, M D’Onofrio, T Dorigo, N Eddy, R Erbacher, D Errede, S Errede, R Eusebi, S Farrington, RG Feild, JP Fernandez, C Ferretti, RD Field, I Fiori, B Flaugher, LR Flores-Castillo, GW Foster, M Franklin, J Friedman, I Furic, M Gallinaro, AF Garfinkel, C Gay, DW Gerdes, E Gerstein, S Giagu, P Giannetti, K Giolo, M Giordani, P Giromini, V Glagolev, D Glenzinski, M Gold, N Goldschmidt, J Goldstein, G Gomez, M Goncharov, I Gorelov, AT Goshaw, Y Gotra, K Goulianos, A Gresele, C Grosso-Pilcher, M Guenther, J Guimaraes da Costa, C Haber, SR Hahn, E Halkiadakis, R Handler, F Happacher, K Hara, RM Harris, F Hartmann, K Hatakeyama, J Hauser, J Heinrich, M Hennecke, M Herndon, C Hill, A Hocker, KD Hoffman, S Hou, BT Huffman, R Hughes, J Huston, J Incandela, G Introzzi, M Iori, C Issever, A Ivanov, Y Iwata, B Iyutin, E James, M Jones, T Kamon, J Kang, M Karagoz Unel, S Kartal, H Kasha, Y Kato, RD Kennedy, R Kephart, B Kilminster, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kim, M Kirby, L Kirsch, S Klimenko, P Koehn, K Kondo, J Konigsberg, A Korn, A Korytov, J Kroll, M Kruse, V Krutelyov, SE Kuhlmann, N Kuznetsova, AT Laasanen, S Lami, S Lammel, J Lancaster, M Lancaster, R Lander, K Lannon, A Lath, G Latino, T LeCompte, Y Le, J Lee, SW Lee, N Leonardo, S Leone, JD Lewis, K Li, CS Lin, M Lindgren, TM Liss, DO Litvintsev, T Liu, NS Lockyer, A Loginov, M Loreti, D Lucchesi, P Lukens, L Lyons, J Lys, R Madrak, K Maeshima, P Maksimovic, L Malferrari, G Manca, M Mangano, M Mariotti, A Martin, M Martin, V Martin, M Martínez, P Mazzanti, KS McFarland, P McIntyre, M Menguzzato, A Menzione, P Merkel, C Mesropian, A Meyer, T Miao, JS Miller, R Miller, S Miscetti, G Mitselmakher, N Moggi, R Moore, T Moulik, A Mukherjee, M Mulhearn, T Muller, A Munar, P Murat, J Nachtman, S Nahn, I Nakano, R Napora, C Nelson, T Nelson, C Neu, MS Neubauer, C Newman-Holmes, F Niell, T Nigmanov, L Nodulman, SH Oh, YD Oh, T Ohsugi, T Okusawa, W Orejudos, C Pagliarone, F Palmonari, R Paoletti, V Papadimitriou, J Patrick, G Pauletta, M Paulini, T Pauly, C Paus, D Pellett, A Penzo, TJ Phillips, G Piacentino, J Piedra, KT Pitts, A Pompoš, L Pondrom, G Pope, O Poukhov, T Pratt, F Prokoshin, J Proudfoot, F Ptohos, G Punzi, J Rademacker, A Rakitine, F Ratnikov, H Ray, A Reichold, P Renton, M Rescigno, F Rimondi, L Ristori, WJ Robertson, T Rodrigo, S Rolli, L Rosenson, R Roser, R Rossin, C Rott, A Roy, A Ruiz, D Ryan, A Safonov, R St. Denis, WK Sakumoto, D Saltzberg, C Sanchez, A Sansoni, L Santi, S Sarkar, P Savard, A Savoy-Navarro, P Schlabach, EE Schmidt, MP Schmidt, M Schmitt, L Scodellaro, A Scribano, A Sedov, S Seidel, Y Seiya, A Semenov, F Semeria, MD Shapiro, PF Shepard, T Shibayama, M Shimojima, M Shochet, A Sidoti, A Sill, P Sinervo, AJ Slaughter, K Sliwa, FD Snider, R Snihur, M Spezziga, L Spiegel, F Spinella, M Spiropulu, A Stefanini, J Strologas, D Stuart, A Sukhanov, K Sumorok, T Suzuki, R Takashima, K Takikawa, M Tanaka, M Tecchio, PK Teng, K Terashi, RJ Tesarek, S Tether, J Thom, TL Thomas, AS Thompson, E Thomson, P Tipton, S Tkaczyk, D Toback, K Tollefson, D Tonelli, M Tönnesmann, H Toyoda, W Trischuk, J Tseng, D Tsybychev, N Turini, F Ukegawa, T Unverhau, T Vaiciulis, A Varganov, E Vataga, S Vejcik, G Velev, G Veramendi, R Vidal, I Vila, R Vilar, I Volobouev, M von der Mey, RG Wagner, RL Wagner, W Wagner, Z Wan, C Wang, MJ Wang, SM Wang, B Ward, S Waschke, D Waters, T Watts, M Weber, WC Wester, B Whitehouse, AB Wicklund, E Wicklund, HH Williams, P Wilson, BL Winer, S Wolbers, M Wolter, S Worm, X Wu, F Würthwein, UK Yang, W Yao, GP Yeh, K Yi, J Yoh, T Yoshida, I Yu, S Yu, JC Yun, L Zanello, A Zanetti, F Zetti, S Zucchelli
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Measurement of the J/ψ meson and b-hadron production cross sections in pp¯ collisions at s=1960 GeV

Physical Review D American Physical Society (APS) 71:3 (2005) 032001

Authors:

D Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, T Arisawa, J-F Arguin, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, GJ Barker, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, E Ben-Haim, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, G Bolla, A Bolshov, PSL Booth, D Bortoletto, J Boudreau, S Bourov, B Brau, C Bromberg, E Brubaker, J Budagov, HS Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, M Campanelli, M Campbell, A Canepa, M Casarsa, D Carlsmith, S Carron, R Carosi, M Cavalli-Sforza, A Castro, P Catastini, D Cauz, A Cerri, L Cerrito, J Chapman, C Chen, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, JP Chou, ML Chu, S Chuang, JY Chung, W-H Chung, YS Chung, CI Ciobanu, MA Ciocci, AG Clark, D Clark, M Coca, A Connolly, M Convery, J Conway, B Cooper, M Cordelli, G Cortiana, J Cranshaw, J Cuevas, R Culbertson, C Currat, D Cyr, D Dagenhart, S Da Ronco, S D’Auria, P de Barbaro, S De Cecco, G De Lentdecker, S Dell’Agnello, M Dell’Orso, S Demers, L Demortier, M Deninno, D De Pedis, PF Derwent, C Dionisi, JR Dittmann, C Dörr, P Doksus, A Dominguez, S Donati, M Donega, J Donini, M D’Onofrio, T Dorigo, V Drollinger, K Ebina, N Eddy, J Ehlers, R Ely, R Erbacher, M Erdmann, D Errede, S Errede, R Eusebi, H-C Fang, S Farrington, I Fedorko, WT Fedorko, RG Feild, M Feindt, JP Fernandez, C Ferretti, RD Field, G Flanagan, B Flaugher, LR Flores-Castillo, A Foland, S Forrester, GW Foster, M Franklin, JC Freeman, Y Fujii, I Furic, A Gajjar, A Gallas, J Galyardt, M Gallinaro, M Garcia-Sciveres, AF Garfinkel, C Gay, H Gerberich, DW Gerdes, E Gerchtein, S Giagu, P Giannetti, A Gibson, K Gibson, C Ginsburg, K Giolo, M Giordani, M Giunta, G Giurgiu, V Glagolev, D Glenzinski, M Gold, N Goldschmidt, D Goldstein, J Goldstein, G Gomez, G Gomez-Ceballos, M Goncharov, O González, I Gorelov, AT Goshaw, Y Gotra, K Goulianos, A Gresele, M Griffiths, C Grosso-Pilcher, U Grundler, M Guenther, J Guimaraes da Costa, C Haber, K Hahn, SR Hahn, E Halkiadakis, A Hamilton, B-Y Han, R Handler, F Happacher, K Hara, M Hare, RF Harr, RM Harris, F Hartmann, K Hatakeyama, J Hauser, C Hays, H Hayward, E Heider, B Heinemann, J Heinrich, M Hennecke, M Herndon, C Hill, D Hirschbuehl, A Hocker, KD Hoffman, A Holloway, S Hou, MA Houlden, BT Huffman, Y Huang, RE Hughes, J Huston, K Ikado, J Incandela, G Introzzi, M Iori, Y Ishizawa, C Issever, A Ivanov, Y Iwata, B Iyutin, E James, D Jang, J Jarrell, D Jeans, H Jensen, EJ Jeon, M Jones, KK Joo, SY Jun, T Junk, T Kamon, J Kang, M Karagoz Unel, PE Karchin, S Kartal, Y Kato, Y Kemp, R Kephart, U Kerzel, V Khotilovich, B Kilminster, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, TH Kim, YK Kim, BT King, M Kirby, L Kirsch, S Klimenko, B Knuteson, BR Ko, H Kobayashi, P Koehn, DJ Kong, K Kondo, J Konigsberg, K Kordas, A Korn, A Korytov, K Kotelnikov, AV Kotwal, A Kovalev, J Kraus, I Kravchenko, A Kreymer, J Kroll, M Kruse, V Krutelyov, SE Kuhlmann, S Kwang, AT Laasanen, S Lai, S Lami, S Lammel, J Lancaster, M Lancaster, R Lander, K Lannon, A Lath, G Latino, R Lauhakangas, I Lazzizzera, Y Le, C Lecci, T LeCompte, J Lee, J Lee, SW Lee, R Lefèvre, N Leonardo, S Leone, S Levy, JD Lewis, K Li, C Lin, CS Lin, M Lindgren, TM Liss, A Lister, DO Litvintsev, T Liu, Y Liu, NS Lockyer, A Loginov, M Loreti, P Loverre, R-S Lu, D Lucchesi, P Lujan, P Lukens, G Lungu, L Lyons, J Lys, R Lysak, D MacQueen, R Madrak, K Maeshima, P Maksimovic, L Malferrari, G Manca, R Marginean, C Marino, A Martin, M Martin, V Martin, M Martínez, T Maruyama, H Matsunaga, M Mattson, P Mazzanti, KS McFarland, D McGivern, PM McIntyre, P McNamara, R NcNulty, A Mehta, S Menzemer, A Menzione, P Merkel, C Mesropian, A Messina, T Miao, N Miladinovic, L Miller, R Miller, JS Miller, R Miquel, S Miscetti, G Mitselmakher, A Miyamoto, Y Miyazaki, N Moggi, B Mohr, R Moore, M Morello, PA Movilla Fernandez, A Mukherjee, M Mulhearn, T Muller, R Mumford, A Munar, P Murat, J Nachtman, S Nahn, I Nakamura, I Nakano, A Napier, R Napora, D Naumov, V Necula, F Niell, J Nielsen, C Nelson, T Nelson, C Neu, MS Neubauer, C Newman-Holmes, T Nigmanov, L Nodulman, O Norniella, K Oesterberg, T Ogawa, SH Oh, YD Oh, T Ohsugi, T Okusawa, R Oldeman, R Orava, W Orejudos, C Pagliarone, E Palencia, R Paoletti, V Papadimitriou, S Pashapour, J Patrick, G Pauletta, M Paulini, T Pauly, C Paus, D Pellett, A Penzo, TJ Phillips, G Piacentino, J Piedra, KT Pitts, C Plager, A Pompoš, L Pondrom, G Pope, X Portell, O Poukhov, F Prakoshyn, T Pratt, A Pronko, J Proudfoot, F Ptohos, G Punzi, J Rademacker, MA Rahaman, A Rakitine, S Rappoccio, F Ratnikov, H Ray, B Reisert, V Rekovic, P Renton, M Rescigno, F Rimondi, K Rinnert, L Ristori, WJ Robertson, A Robson, T Rodrigo, S Rolli, L Rosenson, R Roser, R Rossin, C Rott, J Russ, V Rusu, A Ruiz, D Ryan, H Saarikko, S Sabik, A Safonov, R St. Denis, WK Sakumoto, G Salamanna, D Saltzberg, C Sanchez, A Sansoni, L Santi, S Sarkar, K Sato, P Savard, A Savoy-Navarro, P Schlabach, EE Schmidt, MP Schmidt, M Schmitt, L Scodellaro, A Scribano, F Scuri, A Sedov, S Seidel, Y Seiya, F Semeria, L Sexton-Kennedy, I Sfiligoi, MD Shapiro, T Shears, PF Shepard, D Sherman, M Shimojima, M Shochet, Y Shon, I Shreyber, A Sidoti, J Siegrist, M Siket, A Sill, P Sinervo, A Sisakyan, A Skiba, AJ Slaughter, K Sliwa, D Smirnov, JR Smith, FD Snider, R Snihur, A Soha, SV Somalwar, J Spalding, M Spezziga, L Spiegel, F Spinella, M Spiropulu, P Squillacioti, H Stadie, B Stelzer, O Stelzer-Chilton, J Strologas, D Stuart, A Sukhanov, K Sumorok, H Sun, T Suzuki, A Taffard, R Tafirout, SF Takach, H Takano, R Takashima, Y Takeuchi, K Takikawa, M Tanaka, R Tanaka, N Tanimoto, S Tapprogge, M Tecchio, PK Teng, K Terashi, RJ Tesarek, S Tether, J Thom, AS Thompson, E Thomson, P Tipton, V Tiwari, S Tkaczyk, D Toback, K Tollefson, T Tomura, D Tonelli, M Tönnesmann, S Torre, D Torretta, S Tourneur, W Trischuk, J Tseng, R Tsuchiya, S Tsuno, D Tsybychev, N Turini, M Turner, F Ukegawa, T Unverhau, S Uozumi, D Usynin, L Vacavant, A Vaiciulis, A Varganov, E Vataga, S Vejcik, G Velev, V Veszpremi, G Veramendi, T Vickey, R Vidal, I Vila, R Vilar, I Vollrath, I Volobouev, M von der Mey, P Wagner, RG Wagner, RL Wagner, W Wagner, R Wallny, T Walter, T Yamashita, K Yamamoto, Z Wan, MJ Wang, SM Wang, A Warburton, B Ward, S Waschke, D Waters, T Watts, M Weber, WC Wester, B Whitehouse, AB Wicklund, E Wicklund, HH Williams, P Wilson, BL Winer, P Wittich, S Wolbers, C Wolfe, M Wolter, M Worcester, S Worm, T Wright, X Wu, F Würthwein, A Wyatt, A Yagil, C Yang, UK Yang, W Yao, GP Yeh, K Yi, J Yoh, P Yoon, K Yorita, T Yoshida, I Yu, S Yu, Z Yu, JC Yun, L Zanello, A Zanetti, I Zaw, F Zetti, J Zhou, A Zsenei, S Zucchelli

Abstract:

We present a new measurement of the inclusive and differential production cross sections of J/ψ mesons and b hadrons in proton-antiproton collisions at s=1960 GeV. The data correspond to an integrated luminosity of 39.7 pb-1 collected by the CDF run II detector. We find the integrated cross section for inclusive J/ψ production for all transverse momenta from 0 to 20 GeV/c in the rapidity range |y|<0.6 to be 4.08±0.02(stat)-0.33+0.36(syst) μb. We separate the fraction of J/ψ events from the decay of the long-lived b hadrons using the lifetime distribution in all events with pT(J/ψ)>1.25 GeV/c. We find the total cross section for b hadrons, including both hadrons and antihadrons, decaying to J/ψ with transverse momenta greater than 1.25 GeV/c in the rapidity range |y(J/ψ)|<0.6 is 0.330±0.005(stat)-0.033+0.036(syst) μb. Using a Monte Carlo simulation of the decay kinematics of b hadrons to all final states containing a J/ψ, we extract the first measurement of the total single b-hadron cross section down to zero transverse momentum at s=1960 GeV. We find the total single b-hadron cross section integrated over all transverse momenta for b hadrons in the rapidity range |y|<0.6 to be 17.6±0.4(stat)-2.3+2.5(syst) μb.
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Measurement of the J/ψ meson and b-hadron production cross sections in pp̄ collisions at √s = 1960 GeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 71:3 (2005) 032001-1-032001-26

Authors:

DE Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, DJ Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antoš, M Aoki, G Apollinari, T Arisawa, JF Arguin, AM Artikov, WJ Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, WF Badgett, AA Barbaro-Galtieri, GJ Barker, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, JN Bellinger, E Ben-Haim, DP Benjamin, A Beretvas, AA Bhatti, ME Binkley, DB Bisello, MR Bishai, RE Blair, CA Blocker, K Bloom, BJ Blumenfeld, A Bocci, A Bodek, G Bolla, AA Bolshov, PSL Boóth, D Bortoletto, JF Boudreau, S Bourov, BP Brau, CM Bromberg, EM Brubaker, JA Budagov, HS Budd, K Burkett, G Busetto, PJ Bussey, KL Byrum, S Cabrera, M Campanelli, MK Campbell, A Canepa, M Casarsa, D Carlsmith, S Carron, R Carosi, MC Cavalli-Sforza, AJ Castro, PL Catastini, D Cauz, A Cerri, L Cerrito, JW Chapman, C Chen, Y Chen, MB Chertok, G Chiarelli, GA Chlachidze, FS Chlebana, L Cho, K Cho, D Chokheli, J Chou, M Chu, SHS Chuang, J Chung, WH Chung, Y Chung, CI Ciobanu, MA Ciocci, AG Clark, DE Clark, MN Coca, A Connolly, ME Convery, JS Conway, BD Cooper, M Cordelli, G Cortiana, J Cranshaw, J Cuevas, RL Culbertson, CA Currat, D Cyr, DW Dagenhart, S Da Ronco, S D'Auria, P De Barbaro, SD De Cecco, G De Lentdecker, S Dell'Agnello, M Dell'Orso, SM Demers, L Demortier, MM Deninno, D De Pedis, PF Derwent, C Dionisi, JR Dittmann, C Dörr, P Doksus, A Domínguez, S Donati, M Donegà, J Donini, M D'Onofrio, T Dorigo, DrollingerV, K Ebina, N Eddy, JE Ehlers, RP Ely, RD Erbacher, M Erdmann, D Errede, SM Errede, R Eusebi, H Fang, SM Farrington, I Fedorko, WT Fedorko, RG Feild, M Feindt, JP Fernández, C Ferretti, RD Field, GP Flanagan, BL Flaugher, LR Flores-Castillo, AD Foland, S Forrester, GW Foster, MEB Franklin, JC Freeman, Y Fujii, IK Furić, A Gajjar, AA Gallas, J Galyardt, M Gallinaro, M Garcia-Sciveres, AF Garfinkel, C Gay, HK Gerberich, DW Gerdes, EA Gerchtein, S Giagu, P Giannetti, AJ Gibson, KR Gibson, C Ginsburg, K Giolo, MP Giordani, M Giunta, GA Giurgiu, VV Glagolev, DA Glenzinskí, MS Gold, N Goldschmidt, DJ Goldstein, J Goldstein, G Gómez, G Gómez-Ceballos, MV Goncharov, O González, IV Gorelov, AT Goshaw, YN Gotra, K Goulianos, A Gresele, M Griffiths, C Grosso-Pilcher, U Grundler, M Guenther, JB Guimarães Da Costa, V Haber, K Hahn, SR Hahn, E Halkiadakis, A Hamilton, B Han, R Handler, F Happacher, K Hara, MF Hare, RF Harr, RM Harris, FX Hartmann, K Hatakeyama, J Hauser, CP Hays, HaywardH, EM Heider, B Heinemann, JG Heinrich, M Hennecke, M Herndon, CS Hill, D Hirschbuehl, A Höcker, D HoffmanK, A Holloway, S Hou, MA Houlden, BT Huffman, Y Huang, RE Hughes, JW Huston, K Ikado, JR Incandela, G Introzzi, M Iori, Y Ishizawa, C Ìşsever, A Ivanov, Y Iwata, B Iyutin, EB James, D Jang, J Jarrell, DT Jeans, HB Jensen, E Jeon, MK Jones, K Joo, S Jun, TR Junk, T Kamon, J Kang, MK Ünel, PE Karchin, SN Kartal, Y Kato, Y Kemp, RD Kephart, U Kerzel, V Khotilovich, BJ Kilminster, DH Kim, H Kim, J Kim, M Kim, M Kim, SB Kim, S Kim, T Kim, Y Kim, BT King, MH Kirby, LE Kirsch, S Klimenko, B Knuteson, B Ko, H Kobayashi, P Koehn, D Kong, K Kondo, J Königsberg, K Kordas, A Korn, AV Korytov, KA Kotelnikov, AV Kotwal, AI Kovalev, JA Kraus, IT Kravchenko, AE Kreymer, J Kroll, MC Kruse, V Krutelyov, SE Kuhlmann, S Kwang, AT Laasanen, S Lai, SS Lami, S Lammel, JM Lancaster, MA Lancaster, RL Lander, K Lannon, A Lath, G Latino, RTA Lauhakangas, I Lazzizzera, Y Le, C Lecci, TJ LeCompte, J Lee, J Lee, S Lee, RP Lefèvre, NT Leonardo, S Leone, SL Levy, JD Lewis, K Li, CS Lin, CSS Lin, MA Lindgren, TM Liss, A Lister, DO Litvintsev, T Liu, Y Liu, NS Lockyer, AY Loginov, M Loreti, PF Loverre, R Lu, D Lucchesi, PJ Lujan, PT Lukens, GA Lungu, LPR Lyons, JEA Lys, R Lysak, DM MacQueen, RL Madrak, K Maeshima, P Maksimović, L Malferrari, G Manca, RM Mǎrginean, C Marino, AJ Martin, MS Martin, VJ Martin, MI Martínez, T Maruyama, H Matsunaga, M Mattson, P Mazzanti, KS McFarland, D McGivern, PM McIntyre, PA McNamara, R NcNulty, A Mehta, S Menzemer, A Menzione, P Merkel, C Mesropian, AM Messina, T Miao, N Miladinovic, LM Miller, RJD Miller, JS Miller, R Miquel, S Miscetti, GV Mitselmakher, A Miyamoto, Y Miyazaki, N Moggi, B Mohr, RW Moore, MJ Morello, PAM Fernández, A Mukherjee, M Mulhearn, TA Müller, R Mumford, A Munar, PA Murat, JM Nachtman, S Nahn, I Nakamura, I Nakano, A Napier, R Napora, DV Naumov, V Necula, F Niell, JA Nielsen, CA Nelson, TK Nelson, C Neu, MS Neubauer, CB Newman-Holmes, TS Nigmanov, LJ Nodulman, O Norniella, K Oesterberg, T Ogawa, SH Oh, Y Oh, T Ohsugi, T Okusawa, RGC Oldeman, R Orava, W Orejudos, CE Pagliarone, E Palencia, R Paoletti, VK Papadimitriou, S Pashapour, JF Patrick, G Pauletta, MG Paulini, T Pauly, C Paus, DE Pellett, A Penzo, TJ Phillips, GM Piacentino, J Piedra, KT Pitts, CL Plager, A Pompoš, LG Pondrom, G Pope, X Portell, O Poukhov, F Prakoshyn, T Pratt, A Pronko, J Proudfoot, F Ptohos, G Punzi, JH Rademacker, MA Rahaman, A Rakitine, S Rappoccio, FD Ratnikov, H Ray, B Reisert, V Rekovic, PB Renton, M Rescigno, F Rimondi, K Rinnert, L Ristori, WJ Robertson, A Robson, T Rodrigo, S Rolli, L Rosenson, RM Roser, R Rossin, C Rott, JS Russ, VL Rusu, A Ruiz-Jimeno, DT Ryan, HMT Saarikko, S Sabik, AN Safonov, RDS St Denis, WK Sakumoto, G Salamanna, DP Saltzberg, CAS Sánchez, A Sansoni, L Santi, S Sarkar, K Sato, P Savard, A Savoy-Navarro, P Schlabach, EE Schmidt, MP Schmidt, M Schmitt, L Scodellaro, A Scribano, F Scuri, A Sedov, SC Seidel, Y Seiya, F Semeria, L Sexton-Kennedy, I Sfiligoi, MD Shapiro, TG Shears, PF Shepard, D Sherman, M Shimojima, MJ Shochet, Y Shon, I Shreyber, A Sidoti, JL Siegrist, M Šiket, AF Sill, PK Sinervo, AN Sisakyan, A Skiba, AJ Slaughter, K Śliwa, DV Smirnov, JRH Smith, FD Snider, R Snihur, A Soha, SV Somalwar, J Spalding, MA Spezziga, L Spiegel, F Spinella, M Spiropulu, P Squillacioti, H Stadie, B Stelzer, O Stelzer-Chilton, J Strologas, DD Stuart, AI Sukhanov, KCTO Sumorok, H Sun, T Suzuki, AC Taffard, R Tafirout, SF Takach, H Takano, R Takashima, Y Takeuchi, K Takikawa, M Tanaka, R Tanaka, N Tanimoto, S Tapprogge, M Tecchio, P Teng, K Terashi, RJ Tesarek, S Tether, J Thom, AS Thompson, EJ Thomson, PL Tipton, V Tiwari, SM Tkaczyk, D Toback, K Tollefson, T Tomura, D Tonelli, M Tönnesmann, SD Torre, D Torretta, S Tourneur, W Trischuk, J Tseng, R Tsuchiya, S Tsuno, D Tsybychev, N Turini, MF Turner, F Ukegawa, T Unverhau, S Uozumi, D Usynin, L Vacavant, A Vaiciulis, AV Varganov, ES Vataga, S Vejcik, GV Velev, V Veszprémi, G Veramendi, T Vickey, RA Vidal, I Vila, R Vilar, I Vollrath, I Volobouev, M Von Der Mey, PD Wágner, RG Wagner, RL Wagner, W Wagner, RS Wallny, T Walter, T Yamashita, K Yamamoto, Z Wan, M Wang, S Wang, A Warburton, BR Ward, S Waschke, DS Waters, TL Watts, MS Weber, WC Wester, B Whitehouse, AB Wicklund, EJ Wicklund, HH Williams, PJ Wilson, BL Winer, P Wittich, SA Wolbers, CE Wolfe, MW Wolter, M Worcester, SD Worm, TR Wright, X Wu, F Würthwein, AC Wyatt, A Yagil, C Yang, U Yang, W Yao, GP Yeh, K Yi, J Yoh, PS Yoon, K Yorita, T Yoshida, I Yu, S Yu, Z Yu, JC Yun, L Zanello, AM Zanetti, I Zaw, F Zetti, J Zhou, A Žsenei, S Zucchelli

Abstract:

We present a new measurement of the inclusive and differential production cross sections of J/ψ mesons and b hadrons in proton-antiproton collisions at √s = 1960 GeV. The data correspond to an integrated luminosity of 39.7 pb-1 collected by the CDF run II detector. We find the integrated cross section for inclusive J/ψ production for all transverse momenta from 0 to 20 GeV/c in the rapidity range |y| < 0.6 to be 4.08 ± 0.02(Stat)-0.33 +0.36(syst) μb. We separate the fraction of J/ψ events from the decay of the long-lived b hadrons using the lifetime distribution in all events with pT(J/ψ) > 1.25 GeV/c. We find the total cross section for b hadrons, including both hadrons and antihadrons, decaying to J/ψ with transverse momenta greater than 1.25 GeV/c in the rapidity range |y(J/ψ)| < 0.6 is 0.330 ± 0.005(stat) -0.033 +0.036(syst) μb. Using a Monte Carlo simulation of the decay kinematics of b hadrons to all final states containing a J/ψ, we extract the first measurement of the total single b-hadron cross section down to zero transverse momentum at √s = 1960 GeV. We find the total single b-hadron cross section integrated over all transverse momenta for b hadrons in the rapidity range |y| < 0.6 to be 17.6 ± 0.4(stat) -2.3 +2.5(syst) μb. © 2005 The American Physical Society.
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Measurement of the W boson polarization in top decay at CDF at s=1.8 TeV

Physical Review D American Physical Society (APS) 71:3 (2005) 031101

Authors:

D Acosta, T Affolder, MG Albrow, D Ambrose, D Amidei, K Anikeev, J Antos, G Apollinari, T Arisawa, A Artikov, W Ashmanskas, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, WH Bell, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, G Bolla, A Bolshov, D Bortoletto, J Boudreau, C Bromberg, E Brubaker, J Budagov, HS Budd, K Burkett, G Busetto, KL Byrum, S Cabrera, M Campbell, W Carithers, D Carlsmith, A Castro, D Cauz, A Cerri, L Cerrito, J Chapman, C Chen, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, ML Chu, JY Chung, W-H Chung, YS Chung, CI Ciobanu, AG Clark, M Coca, A Connolly, M Convery, J Conway, M Cordelli, J Cranshaw, R Culbertson, D Dagenhart, S D’Auria, P de Barbaro, S De Cecco, S Dell’Agnello, M Dell’Orso, S Demers, L Demortier, M Deninno, D De Pedis, PF Derwent, C Dionisi, JR Dittmann, A Dominguez, S Donati, M D’Onofrio, T Dorigo, N Eddy, R Erbacher, D Errede, S Errede, R Eusebi, S Farrington, RG Feild, JP Fernandez, C Ferretti, RD Field, I Fiori, B Flaugher, LR Flores-Castillo, GW Foster, M Franklin, J Friedman, I Furic, M Gallinaro, M Garcia-Sciveres, AF Garfinkel, C Gay, DW Gerdes, E Gerstein, S Giagu, P Giannetti, K Giolo, M Giordani, P Giromini, V Glagolev, D Glenzinski, M Gold, N Goldschmidt, J Goldstein, G Gomez, M Goncharov, I Gorelov, AT Goshaw, Y Gotra, K Goulianos, A Gresele, C Grosso-Pilcher, M Guenther, J Guimaraes da Costa, C Haber, SR Hahn, E Halkiadakis, R Handler, F Happacher, K Hara, RM Harris, F Hartmann, K Hatakeyama, J Hauser, J Heinrich, M Hennecke, M Herndon, C Hill, A Hocker, KD Hoffman, S Hou, BT Huffman, R Hughes, J Huston, J Incandela, G Introzzi, M Iori, C Issever, A Ivanov, Y Iwata, B Iyutin, E James, M Jones, T Kamon, J Kang, M Karagoz Unel, S Kartal, H Kasha, Y Kato, RD Kennedy, R Kephart, B Kilminster, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kim, M Kirby, L Kirsch, S Klimenko, P Koehn, K Kondo, J Konigsberg, A Korn, A Korytov, J Kroll, M Kruse, V Krutelyov, SE Kuhlmann, N Kuznetsova, AT Laasanen, S Lami, S Lammel, J Lancaster, M Lancaster, R Lander, K Lannon, A Lath, G Latino, T LeCompte, Y Le, J Lee, SW Lee, N Leonardo, S Leone, JD Lewis, K Li, CS Lin, M Lindgren, TM Liss, DO Litvintsev, T Liu, NS Lockyer, A Loginov, M Loreti, D Lucchesi, P Lukens, L Lyons, J Lys, R Madrak, K Maeshima, P Maksimovic, L Malferrari, G Manca, M Mangano, M Mariotti, A Martin, M Martin, V Martin, M Martínez, P Mazzanti, KS McFarland, P McIntyre, M Menguzzato, A Menzione, P Merkel, C Mesropian, A Meyer, T Miao, JS Miller, R Miller, S Miscetti, G Mitselmakher, N Moggi, R Moore, T Moulik, A Mukherjee, M Mulhearn, T Muller, A Munar, P Murat, J Nachtman, S Nahn, I Nakano, R Napora, C Nelson, T Nelson, C Neu, MS Neubauer, C Newman-Holmes, F Niell, T Nigmanov, L Nodulman, SH Oh, YD Oh, T Ohsugi, T Okusawa, W Orejudos, C Pagliarone, F Palmonari, R Paoletti, V Papadimitriou, J Patrick, G Pauletta, M Paulini, T Pauly, C Paus, D Pellett, A Penzo, TJ Phillips, G Piacentino, J Piedra, KT Pitts, A Pompoš, L Pondrom, G Pope, O Poukhov, T Pratt, F Prokoshin, J Proudfoot, F Ptohos, G Punzi, J Rademacker, A Rakitine, F Ratnikov, H Ray, A Reichold, P Renton, M Rescigno, F Rimondi, L Ristori, WJ Robertson, T Rodrigo, S Rolli, L Rosenson, R Roser, R Rossin, C Rott, A Roy, A Ruiz, D Ryan, A Safonov, R St. Denis, WK Sakumoto, D Saltzberg, C Sanchez, A Sansoni, L Santi, S Sarkar, P Savard, A Savoy-Navarro, P Schlabach, EE Schmidt, MP Schmidt, M Schmitt, L Scodellaro, A Scribano, A Sedov, S Seidel, Y Seiya, A Semenov, F Semeria, MD Shapiro, PF Shepard, T Shibayama, M Shimojima, M Shochet, A Sidoti, A Sill, P Sinervo, AJ Slaughter, K Sliwa, FD Snider, R Snihur, M Spezziga, L Spiegel, F Spinella, M Spiropulu, A Stefanini, J Strologas, D Stuart, A Sukhanov, K Sumorok, T Suzuki, R Takashima, K Takikawa, M Tanaka, M Tecchio, PK Teng, K Terashi, RJ Tesarek, S Tether, J Thom, AS Thompson, E Thomson, P Tipton, S Tkaczyk, D Toback, K Tollefson, D Tonelli, M Tönnesmann, H Toyoda, W Trischuk, J Tseng, D Tsybychev, N Turini, F Ukegawa, T Unverhau, T Vaiciulis, A Varganov, E Vataga, S Vejcik, G Velev, G Veramendi, R Vidal, I Vila, R Vilar, I Volobouev, M von der Mey, RG Wagner, RL Wagner, W Wagner, Z Wan, C Wang, MJ Wang, SM Wang, B Ward, S Waschke, D Waters, T Watts, M Weber, WC Wester, B Whitehouse, AB Wicklund, E Wicklund, HH Williams, P Wilson, BL Winer, S Wolbers, M Wolter, S Worm, X Wu, F Würthwein, UK Yang, W Yao, GP Yeh, K Yi, J Yoh, T Yoshida, I Yu, S Yu, JC Yun, L Zanello, A Zanetti, F Zetti, S Zucchelli

Abstract:

The polarization of the W boson in t→Wb decay is unambiguously predicted by the standard model of electroweak interactions and is a powerful test of our understanding of the tbW vertex. We measure this polarization from the invariant mass of the b quark from t→Wb and the lepton from W→lν whose momenta measure the W decay angle and direction of motion, respectively. In this paper we present a measurement of the decay rate (fV+A) of the W produced from the decay of the top quark in the hypothesis of V+A structure of the tWb vertex. We find no evidence for the nonstandard V+A vertex and set a limit on fV+A < 0.80 at 95% confidence level. By combining this result with a complementary observable in the same data, we assign a limit on fV+A < 0.61 at 95% CL. This corresponds to a constraint on the right-handed helicity component of the W polarization of f+<0.18 at 95% CL. This limit is the first significant direct constraint on fV+A in top decay.
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Quasi-2D confinement of a BEC in a combined optical and magnetic potential

Journal of Physics B Atomic Molecular and Optical Physics 38:3 (2005) 223-235

Authors:

NL Smith, WH Heathcote, G Hechenblaikner, E Nugent, CJ Foot

Abstract:

We have added an optical potential to a conventional time-averaged orbiting potential (TOP) trap to create a highly anisotropic hybrid trap for ultracold atoms. Axial confinement is provided by the optical potential; the maximum frequency currently obtainable in this direction is 2.2 kHz for rubidium. The radial confinement is independently controlled by the magnetic trap and can be a factor of 700 times smaller than in the axial direction. This large anisotropy is more than sufficient to confine condensates with ∼105 atoms in a quasi-2D (Q2D) regime, and we have verified this by measuring a change in the free expansion of the condensate; our results agree with a variational model. © 2005 IOP Publishing Ltd.
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