SEARCH FOR QUARK COMPOSITENESS, AXIGLUONS, AND HEAVY-PARTICLES USING THE DIJET INVARIANT MASS-SPECTRUM OBSERVED IN P(P)OVER-BAR COLLISIONS

PHYSICAL REVIEW LETTERS 71:16 (1993) 2542-2546

Authors:

F ABE, M ALBROW, H AKIMOTO, D AMIDEI, C ANWAYWIESE, G APOLLINARI, H ARETI, P AUCHINCLOSS, F AZFAR, P AZZI, N BACCHETTA, W BADGETT, MW BAILEY, J BAO, P DEBARBARO, A BARBAROGALTIERI, VE BARNES, BA BARNETT, G BAUER, T BAUMANN, F BEDESCHI, S BEHRENDS, S BELFORTE, G BELLETTINI, J BELLINGER, D BENJAMIN, J BENLLOCH, D BENTON, A BERETVAS, JP BERGE, S BERTOLUCCI, A BHATTI, K BIERY, M BINKLEY, F BIRD, D BISELLO, RE BLAIR, C BLOCKER, A BODEK, V BOLOGNESI, D BORTOLETTO, C BOSWELL, T BOULOS, G BRANDENBURG, C BROMBERG, E BUCKLEYGEER, HS BUDD, K BURKETT, G BUSETTO, A BYONWAGNER, KL BYRUM, C CAMPAGNARI, M CAMPBELL, A CANER, W CARITHERS, D CARLSMITH, A CASTRO, Y CEN, F CERVELLI, J CHAPMAN, G CHIARELLI, T CHIKAMATSU, S CIHANGIR, AG CLARK, M COBAL, M CONTRERAS, J CONWAY, J COOPER, M CORDELLI, DP COUPAL, D CRANE, JD CUNNINGHAM, T DANIELS, M DENINNO, F DEJONGH, S DELLAGNELLO, M DELLORSO, L DEMORTIER, B DENBY, PF DERWENT, T DEVLIN, M DICKSON, JP DONE, RB DRUCKER, A DUNN, K EINSWEILER, JE ELIAS, E ENGELS, R ELY, S ENO, D ERREDE, S ERREDE, A ETCHEGOYEN, Q FAN, B FARHAT, I FIORI, B FLAUGHER, GW FOSTER, M FRANKLIN, M FRAUTSCHI, J FREEMAN, J FREIDMAN, H FRISCH, A FRY, TA FUESS, Y FUKUI, S FUNAKI, AF GARFINKEL, S GEER, DW GERDES, P GIANNETTI, N GIOKARIS, P GIROMINI, L GLADNEY, D GLENZINSKI, M GOLD, J GONZALEZ, AT GOSHAW, K GOULIANOS, H GRASSMANN, A GREWAL, G GRIECO, L GROER, C GROSSOPILCHER, C HABER, SR HAHN, R HAMILTON, R HANDLER, RM HANS, K HARA, B HARRAL, RM HARRIS, SA HAUGER, J HAUSER, C HAWK, J HEINRICH, D HENNESSY, R HIPPLE, R HOLLEBEEK, A HOLSCHER, S HONG, G HOUK, P HU, J HUSTON, BT HUFFMAN, R HUGHES, P HURST, J HUTH, J HYLEN, M INCAGLI, J INCANDELA, H ISO, H JENSEN, CP JESSOP, U JOSHI, RW KADEL, T KAMON, T KANEKO, DA KARDELIS, H KASHA, Y KATO, L KEEBLE, R KENNEDY, R KEPHART, P KESTEN, RM KEUP, H KEUTELIAN, F KEYVAN, DH KIM, H KIM, SB KIM, SH KIM, YK KIM, L KIRSCH, P KOEHN, K KONDO, J KONIGSBERG, S KOPP, K KORDAS, W KOSKA, E KOVACS, M KRASBERG, SE KUHLMANN, E KUNS, AT LAASANEN, S LAMMEL, JI LAMOUREUX, T LECOMPTE, S LEONE, JD LEWIS, P LIMON, M LINDGREN, TM LISS, N LOCKYER, O LONG, M LORETI, EH LOW, J LU, D LUCCHESI, CB LUCHINI, P LUKENS, P MAAS, K MAESHIMA, A MAGHAKIAN, P MAKSIMOVIC, M MANGANO, J MANSOUR, M MARIOTTI, JP MARRINER, A MARTIN, JAJ MATTHEWS, R MATTINGLY, P MCINTYRE, P MELESE, A MENZIONE, E MESCHI, S MIKAMO, M MILLER, R MILLER, T MIMASHI, S MISCETTI, M MISHINA, H MITSUSHIO, S MIYASHITA, Y MORITA, S MOULDING, J MUELLER, A MUKHERJEE, T MULLER, LF NAKAE, I NAKANO, C NELSON, D NEUBERGER, C NEWMANHOLMES, L NODULMAN, S OGAWA, KE OHL, R OISHI, T OKUSAWA, R PAOLETTI, V PAPADIMITRIOU, S PARK, J PATRICK, G PAULETTA, L PESCARA, MD PETERS, TJ PHILLIPS, G PIACENTINO, M PILLAI, R PLUNKETT, L PONDROM, J PROUDFOOT, N PRODUIT, F PTOHOS, G PUNZI, K RAGAN, F RIMONDI, L RISTORI, M ROACHBELLINO, WJ ROBERTSON, T RODRIGO, J ROMANO, L ROSENSON, WK SAKUMOTO, D SALTZBERG, A SANSONI, V SCARPINE, A SCHINDLER, P SCHLABACH, EE SCHMIDT, MP SCHMIDT, O SCHNEIDER, G SCIACCA, A SCRIBANO, S SEGLER, S SEIDEL, Y SEIYA, G SGANOS, M SHAPIRO, NM SHAW, Q SHEN, PF SHEPARD, M SHIMOJIMA, M SHOCHET, J SIEGRIST, A SILL, P SINGH, P SINERVO, J SKARHA, K SLIWA, DA SMITH, FD SNIDER, L SONG, T SONG, J SPALDING, P SPHICAS, A SPIES, L STANCO, J STEELE, S STEFANINI, K STRAHL, G SULLIVAN, K SUMOROK, RL SWARTZ, T TAKAHASHI, K TAKIKAWA, F TARTARELLI, Y TERAMOTO, S TETHER, D THERIOT, J THOMAS, R THUN, M TIMKO, P TIPTON, A TITOV, S TKACZYK, A TOLLESTRUP, J TONNISON, J TSENG, M TURCOTTE, N TURINI, F UKEGAWA, G UNAL, N UEMURA, S VEJCIK, R VIDAL, M VONDRACEK, RG WAGNER, RL WAGNER, N WAINER, RC WALKER, J WANG, Q WANG, A WARBURTON, G WATTS, T WATTS, R WEBB, C WENDT, H WENZEL, WC WESTER, T WESTHUSING, AB WICKLUND, E WICKLUND, R WILKINSON, HH WILLIAMS, BL WINER, J WOLINSKI, DY WU, X WU, J WYSS, A YAGIL, W YAO, K YASUOKA, Y YE, GP YEH, M YIN, J YOH, T YOSHIDA, D YOVANOVITCH, I YU, JC YUN, A ZANETTI, F ZETTI, L ZHANG, S ZHANG, W ZHANG, S ZUCCHELLI

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.

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

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

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