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UPPER LIMITS ON THE BRANCHING RATIOS TAU-]MU-GAMMA AND TAU-]E-GAMMA

PHYSICS LETTERS B 359:3-4 (1995) 411-421

Authors:

P ABREU, W ADAM, T ADYE, E AGASI, I AJINENKO, R ALEKSAN, GD ALEKSEEV, PP ALLPORT, S ALMEHED, SJ ALVSVAAG, U AMALDI, S AMATO, A ANDREAZZA, ML ANDRIEUX, P ANTILOGUS, WD APEL, Y ARNOUD, B ASMAN, JE AUGUSTIN, A AUGUSTINUS, P BAILLON, P BAMBADE, F BARAO, R BARATE, G BARBIELLINI, DY BARDIN, GJ BARKER, A BARONCELLI, O BARRING, JA BARRIO, W BARTL, MJ BATES, M BATTAGLIA, M BAUBILLIER, J BAUDOT, KH BECKS, M BEGALLI, P BEILLIERE, Y BELOKOPYTOV, AC BENVENUTI, M BERGGREN, D BERTRAND, F BIANCHI, M BIGI, MS BILENKY, P BILLOIR, D BLOCH, M BLUME, S BLYTH, V BOCCI, T BOLOGNESE, M BONESINI, W BONIVENTO, PSL BOOTH, G BORISOV, C BOSIO, S BOSWORTH, O BOTNER, E BOUDINOV, B BOUQUET, C BOURDARIOS, TJV BOWCOCK, M BOZZO, P BRNACHINI, KD BRAND, T BRENKE, RA BRENNER, C BRICMAN, L BRILLAULT, RCA BROWN, P BRUCKMAN, JM BRUNET, L BUGGE, T BURAN, T BURGSMUELLER, P BUSCHMANN, A BUYS, M CACCIA, M CALVI, AJC ROZAS, T CAMPORESI, V CANALE, M CANEPA, K CANKOCAK, F CAO, F CARENA, P CARRILHO, L CARROLL, C CASO, MVC GIMENEZ, A CATTAI, FR CAVALLO, L CERRITO, V CHABAUD, M CHAPKIN, P CHARPENTIER, L CHAUSSARD, J CHAUVEAU, P CHECCHIA, GA CHELKOV, R CHIERICI, P CHLIAPNIKOV, P CHOCHULA, V CHOROWICZ, V CINDRO, P COLLINS, JL CONTRERAS, R CONTRI, E CORTINA, G COSME, F COSSUTTI, HB CRAWLEY, D CRENNELL, G CROSETTI, JC MAESTRO, S CZELLAR, E DAHLJENSEN, J DAHM, B DALMAGNE, M DAM, G DAMGAARD, A DAUM, PD DAUNCEY, M DAVENPORT, W DASILVA, C DEFOIX, G DELLARICCA, P DELPIERRE, N DEMARIA, A DEANGELIS, H DEBOECK, W DEBOER, S DEBRABANDERE, C DECLERCQ, C DELAVAISSIERE, B DELOTTO, A DEMIN, L DEPAULA, C DESAINTJEAN, H DIJKSTRA, L DICIACCIO, F DJAMA, J DOLBEAU, M DONSZELMANN, K DOROBA, M DRACOS, J DREES, KA DREES, M DRIS, Y DUFOUR, F DUPONT, D EDSALL, R EHRET, G EIGEN, T EKELOF, G EKSPONG, M ELSING, JP ENGEL, N ERSHAIDAT, B ERZEN, ME SANTO, E FALK, D FASSOULIOTIS, M FEINDT, A FERRER, TA FILIPPAS, A FIRESTONE, PA FISCHER, H FOETH, E FOKITIS, F FONTANELLI, F FORMENTI, B FRANEK, P FRENKIEL, DC FRIES, AG FRODESEN, R FRUHWIRTH, F FULDAQUENZER, J FUSTER, A GALLONI, D GAMBA, M GANDELMAN, C GARCIA, J GARCIA, C GASPAR, U GASPARINI, P GAVILLET, EN GAZIS, D GELE, JP GERBER, M GIBBS, R GOKIELI, B GOLOB, G GOPAL, L GORN, M GORSKI, Y GOUZ, Y GRACCO, E GRAZIANI, G GROSDIDIER, P GUNNARSSON, M GUNTHER, J GUY, U HAEDINGER, F HAHN, M HAHN, S HAHN, Z HAJDUK, A HALLGREN, K HAMACHER, W HAO, FJ HARRIS, V HEDBERG, R HENRIQUES, JJ HERNANDEZ, P HERQUET, H HERR, TL HESSING, E HIGON, HJ HILKE, TS HILL, SO HOLMGREN, PJ HOLT, D HOLTHUIZEN, M HOULDEN, J HRUBEC, K HUET, K HULTQVIST, P IOANNOU, JN JACKSON, R JACOBSSON, P JALOCHA, R JANIK, G JARLSKOG, P JARRY, B JEANMARIE, EK JOHANSSON, L JONSSON, P JONSSON, C JORAM, P JUILLOT, M KAISER, F KAPUSTA, M KARLSSON, E KARVELAS, S KATSANEVAS, EC KATSOUFIS, R KERANEN, BA KHOMENKO, NN KHOVANSKI, B KING, NJ KJAER, H KLEIN, A KLOVNING, P KLUIT, JH KOEHNE, B KOENE, P KOKKINIAS, M KORATZINOS, V KOSTIOUKHINE, C KOURKOUMELIS, O KOUZNETSOV, PH KRAMER, M KRAMMER, C KREUTER, J KROLIKOWSKI, I KRONKVIST, Z KRUMSTEIN, W KRUPINSKI, P KUBINEC, W KUCEWICZ, K KURVINEN, C LACASTA, I LAKTINEH, S LAMBLOT, JW LAMSA, L LANCERI, DW LANE, P LANGEFELD, V LAPIN, I LAST, JP LAUGIER, R LAUHAKANGAS, F LEDROIT, V LEFEBURE, CK LEGAN, R LEITNER, Y LEMOIGNE, J LEMONNE, G LENZEN, V LEPELTIER, T LESIAK, D LIKO, R LINDNER, A LIPNIACKA, I LIPPI, B LOERSTAD, M LOKAJICEK, JG LOKEN, JM LOPEZ, A LOPEZFERNANDEZ, MAL AGUERA, D LOUKAS, P LUTZ, L LYONS, J MACNAUGHTON, G MAEHLUM, A MAIO, V MALYCHEV, F MANDL, J MARCO, B MARECHAL, M MARGONI, JC MARIN, C MARIOTTI, A MARKOU, T MARON, C MARTINEZRIVERO, F MARTINEZVIDAL, SMI GARCIA, K MARVIK, F MATORRAS, C MATTEUZZI, G MATTHIAE, M MAZZUCATO, M MCCUBBIN, R MCKAY, R MCNULTY, J MEDBO, C MERONI, WT MEYER, M MICHELOTTO, E MIGLIORE, L MIRABITO, WA MITAROFF, U MJOERNMARK, T MOA, R MOELLER, K MOENIG, MR MONGE, P MORETTINI, H MUELLER, LM MUNDIM, WJ MURRAY, B MURYN, G MYATT, F NARAGHI, FL NAVARRIA, S NAVAS, P NEGRI, S NEMECEK, W NEUMAN, N NEUMEISTER, R NICOLAIDOU, BS NIELSEN, M NIEUWENHUIZEN, V NIKOLAENKO, P NISS, A NOMEROTSKI, A NORMAND, W OBERSCHULTEBECKMANN, V OBRAZTSOV, AG OLSHEVSKI, R ORAVA, K OSTERBERG, A OURAOU, P PAGANINI, M PAGANONI, P PAGES, H PALKA, TD PAPADOPOULOU, L PAPE, C PARKES, F PARODI, A PASSERI, M PEGORARO, L PERALTA, H PERNEGGER, M PERNICKA, A PERROTTA, C PETRIDOU, A PETROLINI, HT PHILLIPS, G PIANA, F PIERRE, M PIMENTA, M PINDO, S PLASZCZYNSKI, O PODOBRIN, ME POL, G POLOK, P POROPAT, V POZDNIAKOV, M PREST, P PRIVITERA, N PUKHAEVA, A PULLIA, D RADOJICIC, S RAGAZZI, H RAHMANI, J RAMES, PN RATOFF, AL READ, M REALE, P REBECCHI, NG REDAELLI, M REGLER, D REID, PB RENTON, LK RESVANIS, F RICHARD, J RICHARDSON, J RIDKY, G RINAUDO, I RIPP, A ROMERO, I RONCAGLIOLO, P RONCHESE, L ROOS, EI ROSENBERG, E ROSSO, P ROUDEAU, T ROVELLI, W RUCKSTUHL, V RUHLMANNKLEIDER, A RUIZ, K RYBICKI, H SAARIKKO, Y SACQUIN, A SADOVSKY, G SAJOT, J SALT, J SANCHEZ, M SANNINO, H SCHNEIDER, MAE SCHYNS, G SCIOLLA, F SCURI, Y SEDYKH, AM SEGAR, A SEITZ, R SEKULIN, RC SHELLARD, I SICCAMA, P SIEGRIST, S SIMONETTI, F SIMONETTO, AN SISAKIAN, B SITAR, TB SKAALI, G SMADJA, N SMIRNOV, O SMIRNOVA, GR SMITH, R SOSNOWSKI, D SOUZASANTOS, T SPASSOV, E SPIRITI, P SPONHOLZ, S SQUARCIA, C STANESCU, S STAPNES, I STAVITSKI, K STEPANIAK, F STICHELBAUT, A STOCCHI, J STRAUSS, R STRUB, B STUGU, M SZCZEKOWSKI, M SZEPTYCKA, T TABARELLI, JP TAVERNET, O TCHIKILEV, A TILQUIN, J TIMMERMANS, LG TKATCHEV, T TODOROV, DZ TOET, A TOMARADZE, B TOME, L TORTORA, G TRANSTROMER, D TREILLE, W TRISCHUK, G TRISTRAM, A TROMBINI, C TRONCON, A TSIROU, ML TURLUER, IA TYAPKIN, M TYNDEL, S TZAMARIAS, B UEBERSCHAER, O ULLALAND, V UVAROV, G VALENTI, E VALLAZZA, C VANDERVELDE, GW VANAPELDOORN, P VANDAM, WK VANDONINCK, J VANELDIK, N VASSILOPOULOS, G VEGNI, L VENTURA, W VENUS, F VERBEURE, M VERLATO, LS VERTOGRADOV, D VILANOVA, P VINCENT, L VITALE, E VLASOV, AS VODOPYANOV, V VRBA, H WAHLEN, C WALCK, M WEIERSTALL, P WEILHAMMER, AM WETHERELL, D WICKE, JH WICKENS, M WIELERS, GR WILKINSON, WSC WILLIAMS, M WINTER, M WITEK, K WOSCHNAGG, K YIP, O YUSHCHENKO, F ZACH, C ZACHARATOU, A ZAITSEV, A ZALEWSKA, P ZALEWSKI, D ZAVRTANIK, E ZEVGOLATAKOS, NI ZIMIN, M ZITO, D ZONTAR, R ZUBERI, GC ZUCCHELLI, G ZUMERLE
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NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 368:1 (1995) R7-R8

Authors:

N Harnew, P Schlein
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Comparison of energy flows in deep inelastic scattering events with and without a large rapidity gap

Physics Letters B 338:4 (1994) 483-496

Authors:

M Derrick, D Krakauer, S Magill, B Musgrave, J Repond, J Schlereth, R Stanek, RL Talaga, J Thron, F Arzarello, R Ayad, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, P Bruni, GC 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, G Maccarrone, A Margotti, T Massam, R Nania, C Nemoz, F Palmonari, A Polini, G Sartorelli, R Timellini, YZ Garcia, A Zichichi, A Bargende, J Crittenden, K Desch, B Diekmann, T Doeker, L Feld, A Frey, M Geerts, G Geitz, M Grothe, H Hartmann, D Haun, K Heinloth, E Hilger, HP Jakob, UF Katz, SM Mari, A Mass, S Mengel, J Mollen, E Paul, C Rembser, R Schattevoy, JL Schneider, D Schramm, J Stamm, R Wedemeyer, S Campbell-Robson, A Cassidy, N Dyce, B Foster, S George, R Gilmore, GP Heath, HF Heath, TJ Llewellyn, CJS Morgado, DJP Norman, JA O'Mara, RJ Tapper, SS Wilson, R Yoshida, RR Rau, M Arneodo, L Iannotti, M Schioppa, G Susinno, A Bernstein, A Caldwell, I Gialas, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, P Borzemski

Abstract:

Energy flows in deep inelastic electron-proton scattering are investigated at a centre-of-mass energy of 269 GeV for the range Q2 ≥ 10 GeV2 using the ZEUS detector. A comparison is made between events with and without a large rapidity gap between the hadronic system and the proton direction. The energy flows, corrected for detector acceptance and resolution, are shown for these two classes of events in both the HERA laboratory frame and the Breit frame. From the differences in the shapes of these energy flows we conclude that QCD radiation is suppressed in the large-rapidity-gap eents compared to the events without a large rapidity gap. © 1994.
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Measurement of time dependent Bd0-Bd0 mixing

Physics Letters B 338:2-3 (1994) 409-420

Authors:

P Abreu, W Adam, T Adye, E Agasi, I Ajinenko, R Aleksan, GD Alekseev, PP Allport, S Almehed, FML Almeida, SJ Alvsvaag, U Amaldi, A Andreazza, P Antilogus, WD Apel, RJ Apsimon, Y Arnoud, B Åsman, JE Augustin, A Augustinus, P Baillon, P Bambade, F Barao, R Barate, DY Bardin, GJ Barker, A Baroncelli, O Barring, JA Barrio, W Bartl, MJ Bates, M Battaglia, M Baubillier, J Bausot, KH Becks, M Begalli, P Beilliere, K Belous, P Beltran, AC Benvenuti, M Berggren, D Bertrand, F Bianchi, M Bigi, MS Bilenky, P Billoir, J Bjarne, D Bloch, J Blocki, S Blyth, V Bocci, PN Bogolubov, T Bolognese, M Bonesini, W Bonivento, PSL Booth, G Borisov, C Bosio, B Bostjancic, S Bosworth, O Botner, B Bouquet, C Bourdarios, TJV Bowcock, M Bozzo, S Braibant, P Branchini, KD Brand, RA Brenner, H Briand, C Bricman, L Brillault, RCA Brown, P Bruckman, JM Brunet, L Bugge, T Buran, A Buys, M Caccia, M Calvi, AJ Camacho Rozas, R Campion, T Camporesi, V Canale, K Cankocak, F Cao, F Carena, P Carrilho, L Carroll, R Cases, C Caso, MV Castillo Gimenez, A Cattai, FR Cavallo, L Cerrito, V Chabaud, A Chan, P Charpentier, L Chaussard, J Chauveau

Abstract:

The time dependent mixing of Bd0-Bd0 mesons has been observed by using the correlations between the charge of D* mesons and the weighted mean charge of particles in each hemisphere. From a reconstructed D*± sample corresponding to about 1.7 million hadronic Z0 decays, the mass difference between the two Bd0 mass eigenstates has been measured to be Δm = 0.50±0.12 (stat.) ± 0.06 (syst.) h {combining short stroke overlay}/ps or, converting into eV/c2: Δm = [3.29 ± 0.79 (stat) ± 0.39 (syst.)] 10-4 eV/c2. © 1994.
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Measurement of total and partial photon proton cross sections at 180 GeV center of mass energy

Zeitschrift für Physik C Particles and Fields 63:3 (1994) 391-408

Authors:

M Derrick, D Krakauer, S Magill, B Musgrave, J Repond, J Schlereth, R Stanek, RL Talaga, J Thron, F Arzarello, R Ayad, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, P Bruni, GC 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, G Maccarrone, A Margotti, T Massam, R Nania, C Nemoz, F Palmonari, G Sartorelli, R Timellini, Y Zamora Garcia, A Zichichi, A Bargende, J Crittenden, K Desch, B Diekmann, T Doeker, L Feld, A Frey, M Geerts, G Geitz, H Hartmann, D Haun, K Heinloth, E Hilger, HP Jakob, UF Katz, S Kramarczyk, A Mass, S Mengel, J Mollen, E Paul, C Rembser, R Schattevoy, JL Schneider, D Schramm, R Wedemeyer, A Cassidy, DG Cussans, N Dyce, B Foster, S George, R Gilmore, GP Heath, HF Heath, M Lancaster, TJ Llewellyn, CJS Morgado, JA O'Mara, RJ Tapper, SS Wilson, R Yoshida, RR Rau, M Arneodo, M Schioppa, G Susinno, A Bernstein, A Caldwell, I Gialas, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, P Borzemski, J Chwastowski, A Eskreys, K Piotrzkowski, M Zachara

Abstract:

Photon proton cross sections for elastic light vector meson production, σelνp, inelastic diffractive production, σndνp, non-diffractive production, σdνp, as well as the total cross section, σtotνp, have been measured at an average υp center of mass energy of 180 GeV with the ZEUS detector at HERA. The resulting values are σelνp = 18 ± 7 μb, σdνp = 33 ± 8 μb, σndνp = 91 ± 11 μb, and σtotνp 143 ± 17 μb, where the errors include statistical and systematic errors added in quadrature. © 1994 Springer-Verlag.
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