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Search for charged Higgs decays of the top quark using hadronic tau decays

ArXiv hep-ex/9601003 (1996)
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Inclusive charged particle distributions in deep inelastic scattering events at HERA

Zeitschrift fur Physik C-Particles and Fields 70:1 (1996) 1-15

Authors:

M Derrick, D Krakauer, S Magill, D Mikunas, B Musgrave, J Repond, R Stanek, RL Talaga, H Zhang, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, P Bruni, G Cara Romeo, G Castellini, L Cifarelli, F Cindolo, A Contin, M Corradi, I Gialas, P Giusti, G Iacobucci, G Laurenti, G Levi, A Margotti, T Massam, R Nania, F Palmonari, A Polini, G Sartorelli, Y Zamora Garcia, A Zichichi, A Bornheim, J Crittenden, K Desch, B Diekmann, T Doeker, M Eckert, L Feld, A Frey, M Geerts, M Grothe, H Hartmann, K Heinloth, L Heinz, E Hilger, HP Jakob, UF Katz, S Mengel, J Mollen, E Paul, M Pfeiffer, C Rembser, D Schramm, J Stamm, R Wedemeyer, S Campbell-Robson, A Cassidy, WN Cottingham, N Dyce, B Foster, S George, ME Hayes, GP Heath, HF Heath, CJS Morgado, JA O'Mara, D Piccioni, DG Roff, RJ Tapper, R Yoshida, RR Rau, M Arneodo, R Ayad, M Capua, A Garfagnini, L Iannotti, M Schioppa, G Susinno, A Bernstein, A Caldwell, N Cartiglia, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, Q Zhu, P Borzemski, J Chwastowski, A Eskreys, K Piotrzkowski, M Zachara, L Zawiejski, L Adamczyk, B Bednarek

Abstract:

A measurement of inclusive charged particle distributions in deep inelastic ep scattering for γ*p centre-of-mass energies 75 < W < 175 GeV and momentum transfer squared 10 < Q2 < 160 GeV2 from the ZEUS detector at HERA is presented. The differential charged particle rates in the γ*p centre-of-mass system as a function of the scaled longitudinal momentum, xF, and of the transverse momentum, pt* and , as a function of xF, W and Q2 are given. Separate distributions are shown for events with (LRG) and without (NRG) a rapidity gap with respect to the proton direction. The data are compared with results from experiments at lower beam energies, with the naive quark parton model and with parton models including perturbative QCD corrections. The comparison shows the importance of the higher order QCD processes. Significant differences of the inclusive charged particle rates between NRG and LRG events at the same W are observed. The value of for LRG events with a hadronic mass MX, which excludes the forward produced baryonic system, is similar to the
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Measurement of the diffractive cross section in deep inelastic scattering

Zeitschrift fur Physik C-Particles and Fields 70:3 (1996) 391-412

Authors:

M Derrick, D Krakauer, S Magill, D Mikunas, B Musgrave, JR Okrasinski, J Repond, R Stanek, RL Talaga, H Zhang, MCK Mattingly, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, P Bruni, G Cara Romeo, G Castellini, L Cifarelli, F Cindolo, A Contin, M Corradi, I Gialas, P Giusti, G Iacobucci, G Laurenti, G Levi, A Margotti, T Massam, R Nania, F Palmonari, A Polini, G Sartorelli, Y Zamora Garcia, A Zichichi, C Amelung, A Bornheim, J Crittenden, T Doeker, M Eckert, L Feld, A Frey, M Geerts, M Grothe, H Hartmann, K Heinloth, L Heinz, E Hilger, HP Jakob, UF Katz, S Mengel, J Mollen, E Paul, M Pfeiffer, C Rembser, D Schramm, J Stamm, R Wedemeyer, S Campbell-Robson, A Cassidy, WN Cottingham, N Dyce, B Foster, S George, ME Hayes, GP Heath, HF Heath, D Piccioni, DG Roff, RJ Tapper, R Yoshida, M Arneodo, R Ayad, M Capua, A Garfagnini, L Iannotti, M Schioppa, G Susinno, A Caldwell, N Cartiglia, Z Jing, W Liu, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, Q Zhu, P Borzemski, J Chwastowski, A Eskreys, M Zachara, L Zawiejski, L Adamczyk, B Bednarek, K Jelén, D Kisielewska

Abstract:

Diffractive scattering of γ∗p → X + N, where N is either a proton or a nucleonic system with MN < 4 GeV has been measured in deep inelastic scattering (DIS) at HERA. The cross section was determined by a novel method as a function of the γ∗p c.m. energy W between 60 and 245 GeV and of the mass MX of the system X up to 15 GeV at average Q2 values of 14 and 31 GeV2. The diffractive cross section dσdi f f /dMX is, within errors, found to rise linearly with W. Parameterizing the W dependence by the form dσdi f f /dMX ∞ (W2)(2αIP - 2) the DIS data yield for the pomeron trajectory αIP = 1.23±0.02(stat)±0.04(syst) averaged over t in the measured kinematic range assuming the longitudinal photon contribution to be zero. This value for the pomeron trajectory is substantially larger than αIP extracted from soft interactions. The value of αIP measured in this analysis suggests that a substantial part of the diffractive DIS cross section originates from processes which can be described by perturbative QCD. From the measured diffractive cross sections the diffractive structure function of the proton F2D(3) (β,Q2, xIP) has been determined, where β is the momentum fraction of the struck quark in the pomeron. The form F2D(3) = constant·(1/xIP)a gives a good fit to the data in all β and Q2 intervals with a = 1.46 ± 0.04(stat) ± 0.08(syst).
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Dijet angular distributions in direct and resolved photoproduction at HERA

PHYSICS LETTERS B 384:1-4 (1996) 401-413

Authors:

M Derrick, D Krakauer, S Magill, D Mikunas, B Musgrave, JR Okrasinski, J Repond, R Stanek, RL Talaga, H Zhang, MCK Mattingly, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, P Bruni, GC Romeo, G Castellini, L Cifarelli, F Cindolo, A Contin, M Corradi, I Gialas, P Giusti, G Iacobucci, G Laurenti, G Levi, A Margotti, T Massam, R Nania, F Palmonari, A Polini, G Sartorelli, YZ Garcia, A Zichichi, C Amelung, A Bornheim, J Crittenden, R Deffner, T Doeker, M Eckert, L Feld, A Frey, M Geerts, M Grothe, H Hartmann, K Heinloth, L Heinz, E Hilger, HP Jakob, UF Katz, S Mengel, E Paul, M Pfeiffer, C Rembser, D Schramm, J Stamm, R Wedemeyer, S CampbellRobson, A Cassidy, WN Cottingham, N Dyce, B Foster, S George, ME Hayes, GP Heath, HF Heath, D Piccioni, DG Roff, RJ Tapper, R Yoshida, M Arneodo, R Ayad, M Capua, A Garfagnini, L Iannotti, M Schioppa, G Susinno, A Caldwell, N Cartiglia, Z Jing, W Liu, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, Q Zhu, P Borzemski, J Chwastowski, A Eskreys, Z Jakubowski, MB Przybycien, M Zachara, L Zawiejski, L Adamczyk, B Bednarek, K Jelen, D Kisielewska, T Kowalski, M Przybycien, E RulikowskaZarebska, L Suszycki, J Zajac, Z Dulinski, A Kotanski, G Abbiendi, LAT Bauerdick, U Behrens, H Beier, JK Bienlein, G Cases, O Deppe, K Desler, G Drews, M Flasinski, DJ Gilkinson, C Glasman, P Gottlicher, J GrosseKnetter, T Haas, W Hain, D Hasell, A Hessling, Y Iga, KF Johnson, P Joos, M Kasemann, R Klanner, W Koch, U Kotz, H Kowalski, J Labs, A Ladage, B Lohr, M Lowe, D Luke, J Mainusch, O Manczak, J Milewski, T Monteiro, JST Ng, D Notz, K Ohrenberg, K Piotrzkowski, M Roco, M Rohde, J Roldan, U Schneekloth, W Schulz, F Selonke, B Surrow, T Voss, D Westphal, G Wolf, U Wollmer, C Youngman, W Zeuner, HJ Grabosch, A Kharchilava, SM Mari, A Meyer, S Schlenstedt, N Wulff, G Barbagli, E Gallo, P Pelfer, G Maccarrone, S DePasquale, L Votano, A Bamberger, S Eisenhardt, T Trefzger, S Wolfle, JT Bromley, NH Brook, PJ Bussey, AT Doyle, DH Saxon, LE Sinclair, ML Utley, AS Wilson, A Dannemann, U Holm, D Horstmann, R Sinkus, K Wick, BD Burow, L Hagge, E Lohrmann, G Poelz, W Schott, F Zetsche, TC Bacon, N Brummer, I Butterworth, VL Harris, G Howell, BHY Hung, L Lamberti, KR Long, DB Miller, N Pavel, A Prinias, JK Sedgbeer, D Sideris, AF Whitfield, U Mallik, MZ Wang, SM Wang, JT Wu, SH An, GH Cho, BJ Ko, SB Lee, SW Nam, HS Park, SK Park, S Kartik, HJ Kim, RR McNeil, W Metcalf, VK Nadendla, F Barreiro, JP Fernandez, R Graciani, JM Hernandez, L Hervas, L Labarga, M Martinez, J delPeso, J Puga, J Terron, JF deTroconiz, F Corriveau, DS Hanna, J Hartmann, LW Hung, JN Lim, CG Matthews, PM Patel, M Riveline, DG Stairs, M StLaurent, R Ullmann, G Zacek, T Tsurugai, V Bashkirov, BA Dolgoshein, A Stifutkin, GL Bashindzhagyan, PF Ermolov, LK Gladilin, YA Golubkov, VD Kobrin, IA Korzhavina, VA Kuzmin, OY Lukina, AS Proskuryakov, AA Savin, LM Shcheglova, AN Solomin, NP Zotov, M Botje, F Chlebana, J Engelen, M deKamps, P Kooijman, A Kruse, A vanSighem, H Tiecke, W Verkerke, J Vossebeld, M Vreeswijk, L Wiggers, E deWolf, R vanWoudenberg, D Acosta, B Bylsma, LS Durkin, J Gilmore, C Li, TY Ling, P Nylander, IH Park, TA Romanowski, DS Bailey, RJ Cashmore, AM CooperSarkar, RCE Devenish, N Harnew, M Lancaster, L Lindemann, JD McFall, C Nath, VA Noyes, A Quadt, JR Tickner, H Uijterwaal, R Walczak, DS Waters, FF Wilson, T Yip, A Bertolin, R Brugnera, R Carlin, F DalCorso, M DeGiorgi, U Dosselli, S Limentani, M Morandin, M Posocco, L Stanco, R Stroili, C Voci, F Zuin, G DAgostini, G Marini, A Nigro, E Tassi, JC Hart, NA McCubbin, TP Shah, E Barberis, T Dubbs, C Heusch, M VanHook, W Lockman, JT Rahn, HFW Sadrozinski, A Seiden, DC Williams, J Biltzinger, RJ Seifert, O Schwarzer, AH Walenta, G Zech, H Abramowicz, G Briskin, S Dagan, A Levy, JI Fleck, M Inuzuka, T Ishii, M Kuze, S Mine, M Nakao, I Suzuki, K Tokushuku, K Umemori, S Yamada, Y Yamazaki, M Chiba, R Hamatsu, T Hirose, K Homma, S Kitamura, T Matsushita, K Yamuchi, R Cirio, M Costa, MI Ferrero, S Maselli, C Peroni, R Sacchi, A Solano, A Staiano, M Dardo, DC Bailey, F Benard, M Brkic, CP Fagerstroem, GF Hartner, KK Joo, GM Levman, JF Martin, RS Orr, S Polenz, CR Sampson, D Simmons, RJ Teuscher, JM Butterworth, CD Catterall, TW Jones, PB Kaziewicz, JB Lane, RL Saunders, J Shulman, MR Sutton, B Lu, LW Mo, W Bogusz, J Ciborowski, J Gajewski, G Grzelak, M Kasprzak, M Krzyzanowski, K Muchorowski, RJ Nowak, JM Pawlak, T Tymieniecka, AK Wroblewski, JA Zakrzewski, AF Zarnecki, C Coldewey, Y Eisenberg, D Hochman, U Karshon, D Revel, D ZerZion, WF Badgett, J Breitweg, D Chapin, R Cross, S Dasu, C Foudas, RJ Loveless, S Mattingly, DD Reeder, S Silverstein, WH Smith, A Vaiciulis, M Wodarczyk, S Bhadra, ML Cardy, WR Frisken, M Khakzad, WN Murray, WB Schmidke
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Inclusive charged particle distributions in deep inelastic scattering events at HERA

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 70:1 (1996) 1-15

Authors:

M Derrick, D Krakauer, S Magill, D Mikunas, B Musgrave, J Repond, R Stanek, RL Talaga, H Zhang, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, P Bruni, GC Romeo, G Castellini, L Cifarelli, F Cindolo, A Contin, M Corradi, I Gialas, P Giusti, G Iacobucci, G Laurenti, G Levi, A Margotti, T Massam, R Nania, F Palmonari, A Polini, G Sartorelli, YZ Garcia, A Zichichi, A Bornheim, J Crittenden, K Desch, B Diekmann, T Doeker, M Eckert, L Feld, A Frey, M Geerts, M Grothe, H Hartmann, K Heinloth, L Heinz, E Hilger, HP Jakob, UF Katz, S Mengel, J Mollen, E Paul, M Pfeiffer, C Rembser, D Schramm, J Stamm, R Wedemeyer, S CampbellRobson, A Cassidy, WN Cottingham, N Dyce, B Foster, S George, ME Hayes, GP Heath, HF Heath, CJS Morgado, JA OMara, D Piccioni, DG Roff, RJ Tapper, R Yoshida, RR Rau, M Arneodo, R Ayad, M Capua, A Garfagnini, L Iannotti, N Schioppa, G Susinno, A Bernstein, A Caldwell, N Cartiglia, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, Q Zhu, P Borzemski, J Chwastowski, A Eskreys, K Piotrzkowski, M Zachara, L Zawiejski, L Adamczyk, B Bednarek, K Jelen, D Kisielewska, T Kowalski, M Przybycien, E RulikowskaZarebska, L Suszycki, J Zajac, A Kotanski, LAT Bauerdick, U Behrens, H Beier, JK Bienlein, C Coldewey, O Deppe, K Desler, G Drews, M Flasinski, DJ Gilkinson, C Glasman, P Gottlicher, J GrosseKnetter, B Gutjahr, T Haas, W Hain, D Hasell, H Hessling, Y Iga, KF Johnson, P Joos, M Kasemann, R Klanner, W Koch, L Kopke, U Kotz, H Kowalski, J Labs, A Ladage, B Lohr, M Lowe, D Luke, J Mainusch, O Manczak, T Monteiro, JST Ng, S Nickel, D Notz, K Ohrenberg, M Roco, M Rohde, J Roldan, U Schneekloth, W Schulz, F Selonke, E Stiliaris, B Surrow, T Voss, D Westphal, G Wolf, C Youngman, W Zeuner, JF Zhou, HJ Grabosch, A Kharchilava, A Leich, SM Mari, MCK Mattingly, A Meyer, S Schlenstedt, N Wulff, G Barbagli, E Gallo, P Pelfer, G Maccarrone, S DePasquale, L Votano, A Bamberger, S Eisenhardt, A Freidhof, S SoldnerRembold, J Schroeder, T Trefzger, JT Bromley, NH Brook, PJ Bussey, AT Doyle, DH Saxon, ML Utley, AS Wilson, A Dannemann, U Holm, D Horstmann, T Neumann, R Sinkus, K Wick, E Badura, BD Burow, L Hagge, E Lohrmann, J Milewski, M Nakahata, N Pavel, G Poelz, W Schott, F Zetsche, TC Bacon, N Bruemmer, I Butterworth, VL Harris, BYH Hung, KR Long, DB Miller, PPO Morawitz, A Prinias, JK Sedgbeer, AF Whitfield, U Mallik, E McCliment, MZ Wang, SM Wang, JT Wu, P Cloth, D Filges, SH An, GH Cho, BJ Ko, SB Lee, SW Nam, HS Park, SK Park, R Imlay, S Kartik, HJ Kim, RR McNeil, W Metcalf, VK Nadendla, F Barreiro, G Cases, JP Fernandez, R Graciani, JM Hernandez, L Hervas, L Labarga, M Martinez, J delPeso, J Puga, J Terron, JF deTroconiz, GR Smith, F Corriveau, DS Hanna, J Hartmann, LW Hung, JN Lim, CG Matthews, PM Patel, LE Sinclair, DG Stairs, M StLaurent, R Ullmann, G Zacek, V Bashkirov, BA Dolgoshein, A Stifutkin, GL Bashindzhagyan, PF Ermolov, LK Gladilin, YA Golubkov, VD Kobrin, IA Korzhavina, VA Kuzmin, OY Lukina, AS Proskuryakov, AA Savin, LM Shcheglova, AN Solomin, NP Zotov, M Botje, F Chlebana, A Dake, J Engelen, M deKamps, P Kooijman, A Kruse, H Tiecke, W Verkerke, M Vreeswijk, L Wiggers, E deWolf, R vanWoudenberg, D Acosta, B Bylsma, LS Durkin, J Gilmore, K Honscheid, C Li, TY Ling, KW McLean, P Nylander, IH Park, TA Romanowski, R Seidlein, DS Bailey, A Byrne, RJ Cashmore, AM CooperSarkar, RCE Devenish, N Harnew, M Lancaster, L Lindemann, JD McFall, C Nath, VA Noyes, A Quadt, JR Tickner, H Uijterwaal, R Walczak, DS Waters, FF Wilson, T Yip, G Abbiendi, A Bertolin, R Brugnera, R Carlin, F DalCorso, M DeGiorgi, U Dosselli, S Limentani, M Morandin, M Posocco, L Stanco, R Stroili, C Voci, J Bulmahn, JM Butterworth, RG Feild, BY Oh, JR Okrasinski, JJ Whitmore, G DAgostini, G Marini, A Nigro, E Tassi, JC Hart, NA McCubbin, K Prytz, TP Shah, TL Short, E Barberis, T Dubbs, C Heusch, M VanHook, W Lockman, JT Rahn, HFW Sadrozinski, A Seiden, DC Williams, J Biltzinger, RJ Seifert, O Schwarzer, AH Walenta, G Zech, H Abramowicz, G Briskin, S Dagan, A Levy, JI Fleck, T Hasegawa, M Hazumi, T Ishii, M Kuze, S Mine, Y Nagasawa, M Nakao, I Suzuki, K Tokushuku, S Yamada, Y Yamazaki, M Chiba, R Hamatsu, T Hirose, K Homma, S Kitamura, Y Nakamitsu, K Yamauchi, R Cirio, M Costa, MI Ferrero, L Lamberti, S Maselli, C Peroni, R Sacchi, A Solano, A Staiano, M Dardo, DC Bailey, F Benard, M Brkic, GF Hartner, KK Joo, GM Levman, JF Martin, RS Orr, S Polenz, CR Sampson, RJ Teuscher, CD Catterall, TW Jones, PB Kaziewicz, JB Lane, RL Saunders, J Shulman, K Blankenship, B Lu, LW Mo, W Bogusz, K Charchula, J Ciborowski, J Gajewski, G Grzelak, M Kasprzak, M Krzyzanowski, K Muchorowski, RJ Nowak, JM Pawlak, T Tymieniecka, AK Wroblewski, JA Zakrzewski, AF Zarnecki, M Adamus, Y Eisenberg, U Karshon, D Revel, D ZerZion, I Ali, WF Badgett, B Behrens, S Dasu, C Fordham, C Foudas, A Goussiou, RJ Loveless, DD Reeder, S Silverstein, WH Smith, A Vaiciulis, M Wodarczyk, T Tsurugai, S Bhadra, ML Cardy, CP Fagerstroem, WR Frisken, M Khakzad, WN Murray, WB Schmidke
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