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Observation of hard scattering in photoproduction at HERA

Physics Letters B 297:3-4 (1992) 404-416

Authors:

M Derrick, D Krakauer, S Magill, B Musgrave, J Repond, K Sugano, R Stanek, RL Talaga, J Thron, F Arzarello, R Ayed, G Barbagli, G Bari, M Basile, L Bellagamba, D Boscherini, G Bruni, P Bruni, G Cara Romeo, G Castellini, M Chiarini, L Cifarelli, F Cindolo, F Ciralli, A Contin, S D'Auria, C Del Papa, F Frasconi, P Giusti, G Iacobucci, G Laurenti, G Levi, Q Lin, B Lisowski, G Maccarrone, A Margotti, T Massam, R Nania, C Nemoz, F Palmonari, G Sartorelli, R Timellini, Y Zamora Garcia, A Zichichi, A Bargende, F Barreiro, J Crittenden, H Dabbous, K Desch, B Diekmann, M Geerts, G Geitz, B Gutjahr, H Hartmann, J Hartmann, D Haun, K Heinloth, E Hilger, HP Jakob, S Kramarczyk, M Kückes, A Mass, S Mengel, J Mollen, H Müsch, E Paul, R Schattevoy, B Schneider, JL Schneider, R Wedemeyer, A Cassidy, DG Cussans, N Dyce, HF Fawcett, B Foster, R Gilmore, GP Heath, M Lancaster, TJ Llewellyn, J Malos, CJS Morgado, RJ Tapper, SS Wilson, RR Rau, A Bernstein, A Caldwell, I Gialas, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, T Barillari, M Schioppa, G Susinno, W Burkot, J Chwastowski, A Dwuraźny, A Eskreys

Abstract:

We report a study of electron proton collisions at very low Q2, corresponding to virtual photoproduction at centre of mass energies in the range 100-295 GeV. The distribution in transverse energy of the observed hadrons is much harder than can be explained by soft processes. Some of the events show back-to-back two-jet production at the rate and with the characteristics expected from hard two-body scattering. A subset of the two-jet events have energy in the electron direction consistent with that expected from the photon remnant in resolved photon processes. © 1992.
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Measurement of the tau lepton electronic branching fraction

Physical Review Letters American Physical Society (APS) 69:25 (1992) 3610-3614

Authors:

DS Akerib, B Barish, M Chadha, DF Cowen, G Eigen, JS Miller, J Urheim, AJ Weinstein, D Acosta, G Masek, B Ong, H Paar, M Sivertz, A Bean, J Gronberg, R Kutschke, S Menary, RJ Morrison, HN Nelson, JD Richman, H Tajima, D Schmidt, D Sperka, MS Witherell, M Procario, S Yang, M Daoudi, WT Ford, DR Johnson, K Lingel, M Lohner, P Rankin, JG Smith, JP Alexander, C Bebek, K Berkelman, D Besson, TE Browder, DG Cassel, DM Coffman, PS Drell, R Ehrlich, RS Galik, M Garcia-Sciveres, B Geiser, B Gittelman, SW Gray, DL Hartill, BK Heltsley, K Honscheid, C Jones, J Kandaswamy, N Katayama, PC Kim, DL Kreinick, GS Ludwig, J Masui, J Mevissen, NB Mistry, CR Ng, E Nordberg, C O’Grady, JR Patterson, D Peterson, D Riley, M Sapper, M Selen, H Worden, M Worris, F Würthwein, P Avery, A Freyberger, J Rodriguez, R Stephens, J Yelton, D Cinabro, S Henderson, K Kinoshita, T Liu, M Saulnier, R Wilson, H Yamamoto, AJ Sadoff, R Ammar, S Ball, P Baringer, D Coppage, N Copty, R Davis, N Hancock, M Kelly, N Kwak, H Lam, Y Kubota, M Lattery, JK Nelson, S Patton, D Perticone, R Poling, V Savinov, S Schrenk, R Wang, MS Alam, IJ Kim, B Nemati, JJ O’Neill, V Romero, H Severini, CR Sun, P-N Wang, MM Zoeller, G Crawford, R Fulton, KK Gan, H Kagan, R Kass, J Lee, R Malchow, F Morrow, M Sung, C White, J Whitmore, P Wilson, F Butler, X Fu, G Kalbfleisch, M Lambrecht, WR Ross, P Skubic, J Snow, P-L Wang, D Bortoletto, DN Brown, J Dominick, RL McIlwain, T Miao, DH Miller, M Modesitt, SF Schaffner, EI Shibata, IPJ Shipsey, M Battle, J Ernst, H Kroha, S Roberts, K Sparks, EH Thorndike, C-H Wang, S Sanghera, T Skwarnicki, R Stroynowski, M Artuso, M Goldberg, N Horwitz, R Kennett, GC Moneti, F Muheim, S Playfer, Y Rozen, P Rubin, S Stone, M Thulasidas, W-M Yao, G Zhu, AV Barnes, J Bartelt, SE Csorna, Z Egyed, V Jain, P Sheldon
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Measurement of τ decays involving η mesons

Physical Review Letters American Physical Society (APS) 69:23 (1992) 3278-3281

Authors:

M Artuso, M Goldberg, N Horwitz, R Kennett, GC Moneti, F Muheim, S Playfer, Y Rozen, P Rubin, S Stone, M Thulasidas, W-M Yao, G Zhu, AV Barnes, J Bartelt, SE Csorna, Z Egyed, V Jain, P Sheldon, DS Akerib, B Barish, M Chadha, DF Cowen, G Eigen, JS Miller, J Urheim, AJ Weinstein, D Acosta, G Masek, B Ong, H Paar, M Sivertz, A Bean, J Gronberg, R Kutschke, S Menary, RJ Morrison, H Nelson, J Richman, H Tajima, D Schmidt, D Sperka, M Witherell, M Procario, S Yang, M Daoudi, WT Ford, DR Johnson, K Lingel, M Lohner, P Rankin, JG Smith, JP Alexander, C Bebek, K Berkelman, D Besson, TE Browder, DG Cassel, DM Coffman, PS Drell, R Ehrlich, RS Galik, M Garcia-Sciveres, B Geiser, B Gittelman, SW Gray, DL Hartill, BK Heltsley, K Honscheid, C Jones, J Kandaswamy, N Katayama, PC Kim, DL Kreinick, GS Ludwig, J Masui, J Mevissen, NB Mistry, CR Ng, E Nordberg, C O’Grady, JR Patterson, D Peterson, D Riley, M Sapper, M Selen, H Worden, M Worris, F Würthwein, P Avery, A Freyberger, J Rodriguez, R Stephens, J Yelton, D Cinabro, S Henderson, K Kinoshita, T Liu, M Saulnier, R Wilson, H Yamamoto, AJ Sadoff, R Ammar, S Ball, P Baringer, D Coppage, N Copty, R Davis, N Hancock, M Kelly, N Kwak, H Lam, Y Kubota, M Lattery, JK Nelson, S Patton, D Perticone, R Poling, V Savinov, S Schrenk, R Wang, MS Alam, IJ Kim, B Nemati, JJ O’Neill, V Romero, H Severini, CR Sun, P-N Wang, MM Zoeller, G Crawford, R Fulton, KK Gan, H Kagan, R Kass, J Lee, R Malchow, F Morrow, M Sung, C White, J Whitmore, P Wilson, F Butler, X Fu, G Kalbfleisch, M Lambrecht, WR Ross, P Skubic, J Snow, P-L Wang, D Bortoletto, DN Brown, J Dominick, RL McIlwain, T Miao, DH Miller, M Modesitt, SF Schaffner, EI Shibata, IPJ Shipsey, M Battle, J Ernst, H Kroha, S Roberts, K Sparks, EH Thorndike, C-H Wang, S Sanghera, T Skwarnicki, R Stroynowski
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Shape studies of quark jets versus gluon jets at s=10 GeV

Physical Review D American Physical Society (APS) 46:11 (1992) 4822-4827

Authors:

MS Alam, IJ Kim, B Nemati, JJ O'Neill, V Romero, H Severini, CR Sun, P-N Wang, MM Zoeller, G Crawford, R Fulton, KK Gan, H Kagan, R Kass, J Lee, R Malchow, F Morrow, M Sung, C White, J Whitmore, P Wilson, F Butler, X Fu, G Kalbfleisch, M Lambrecht, P Skubic, J Snow, P-L Wang, D Bortoletto, DN Brown, J Dominick, RL McIlwain, T Miao, DH Miller, M Modesitt, SF Schaffner, EI Shibata, IPJ Shipsey, M Battle, J Ernst, H Kroha, S Roberts, K Sparks, EH Thorndike, C-H Wang, M Artuso, M Goldberg, T Haupt, N Horwitz, R Kennett, GC Moneti, S Playfer, Y Rozen, P Rubin, T Skwarnicki, S Stone, M Thulasidas, W-M Yao, G Zhu, R Stroynowski, AV Barnes, J Bartelt, SE Csorna, Z Egyed, V Jain, T Letson, MD Mestayer, P Sheldon, DS Akerib, B Barish, M Chadha, DF Cowen, G Eigen, JS Miller, J Urheim, AJ Weinstein, S Menary, RJ Morrison, HN Nelson, J Richman, H Tajima, D Schmidt, D Sperka, M Witherell, D Acosta, G Masek, B Ong, H Paar, M Sivertz, M Procario, M Daoudi, WT Ford, DR Johnson, K Lingel, M Lohner, P Rankin, JG Smith, J Alexander, C Bebek, K Berkelman, D Besson, TE Browder, DG Cassel, EC Cheu, DM Coffman, PS Drell, R Ehrlich, M Garcia-Sciveres, B Geiser, B Gittelman, SW Gray, DL Hartill, BK Heltsley, K Honscheid, C Jones, J Kandaswamy, N Katayama, PC Kim, DL Kreinick, GS Ludwig, J Masui, J Mevissen, NB Mistry, S Nandi, CR Ng, E Nordberg, C O'Grady, JR Patterson, D Peterson, D Riley, M Sapper, M Selen, H Worden, M Worris, F Würthwein, P Avery, A Freyberger, J Rodriguez, R Stephens, J Yelton, S Henderson, K Kinoshita, T Liu, M Saulnier, R Wilson, H Yamamoto, AJ Sadoff, R Ammar, S Ball, P Baringer, D Coppage, R Davis, N Hancock, M Kelly, N Kwak, H Lam, S Ro, Y Kubota, M Lattery, JK Nelson, D Perticone, R Poling, S Schrenk, R Wang
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Exclusive χ(2P) production in ϒ(3S) decay

Physics Letters B Elsevier 294:1 (1992) 139-144

Authors:

CLEO Collaboration, G Crawford, R Fulton, KK Gan, H Kagan, R Kass, J Lee, R Malchow, F Morrow, M Sung, C White, J Whitmore, P Wilson, F Butler, X Fu, G Kalbfleisch, M Lambrecht, P Skubic, J Snow, P-L Wang, D Bortoletto, DN Brown, J Dominick, RL McIlwain, T Miao, DH Miller, M Modesitt, SF Schaffner, EI Shibata, IPJ Shipsey, M Battle, J Ernst, H Kroha, S Roberts, K Sparks, EH Thorndike, C-H Wang, R Stroynowski, M Artuso, M Goldberg, N Horwitz, R Kennett, GC Moneti, S Playfer, Y Rozen, P Rubin, T Skwarnicki, S Stone, M Thulasidas, W-M Yao, G Zhu, AV Barnes, J Bartelt, SE Csorna, Z Egyed, V Jain, T Letson, MD Mestayer, P Sheldon, DS Akerib, B Barish, M Chadha, DF Cowen, G Eigen, JS Miller, J Urheim, AJ Weinstein, D Acosta, G Masek, B Ong, H Paar, M Sivertz, S Menary, RJ Morrison, H Nelson, J Richman, H Tajima, D Schmidt, D Sperka, M Witherell, M Procario, M Daoudi, WT Ford, DR Johnson, K Lingel, M Lohner, P Rankin, JG Smith, JP Alexander, C Bebek, K Berkelman, D Besson, TE Browder, DG Cassel, E Cheu, DM Coffman, PS Drell, R Ehrlich, RS Galik, M Garcia-Sciveres, B Geiser, B Gittelman, SW Gray, DL Hartill, BK Heltsley, K Honscheid, C Jones, J Kandaswamy, N Katayama, PC Kim, DL Kreinick, GS Ludwig, J Masui, J Mevissen, NB Mistry, S Nandi, CR Ng, E Nordberg, C O'Grady, JR Patterson, D Peterson, D Riley, M Sapper, M Selen, H Worden, M Worris, F Würthwein, P Avery, A Freyberger, J Rodriguez, R Stephens, J Yelton, D Cinabro, S Henderson, K Kinoshita, T Liu, M Saulnier, R Wilson, H Yamamoto, AJ Sadoff, R Ammar, S Ball, P Baringer, D Coppage, R Davis, N Hancock, M Kelly, N Kwak, H Lam, S Ro, Y Kubota, M Lattery, JK Nelson, S Patton, D Perticone, R Poling, S Schrenk, R Wang, MS Alam, IJ Kim, JJ O'Neill, B Nemati, V Romero, H Severini, CR Sun, P-N Wang, MM Zoeller
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