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Insertion of STC into TRT at the Department of Physics, Oxford
Credit: CERN

Professor Amanda Cooper-Sarkar

Emeritus Professor

Research theme

  • Fundamental particles and interactions

Sub department

  • Particle Physics

Research groups

  • ATLAS
Amanda.Cooper-Sarkar@physics.ox.ac.uk
Telephone: 01865 (2)73406
Denys Wilkinson Building, room 659
  • About
  • Publications

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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A measurement of σtot(γp) at S = 210 GeV

Physics Letters B 293:3-4 (1992) 465-477

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, 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, 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:

The total photoproduction cross section is determined from a measurement of electroproduction with the ZEUS detector at HERA. The Q2 values of the virtual photons are in the range 10-7
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A measurement of σtot(γp) at S = 210 GeV

Physics Letters B Elsevier 293:3-4 (1992) 465-477

Authors:

ZEUS Collaboration, 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, H-P Jakob, S Kramarczyk, M Kückes, A Mass, S Mengel, J Mollen, H Müsch, E Paul, R Schattevoy, B Schneider, J-L 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, B Nizioł, Z Jakubowski, K Piotrzkowski, M Zachara, L Zawiejski, P Borzemski, K Eskreys, K Jeleń, D Kisielewska, T Kowalski, J Kulka, E Rulikowska-Zarȩbska, L Suszycki, J Zaja̧c, T Kȩdzierski, A Kotański, M Przybycień, LAT Bauerdick, U Behrens, JK Bienlein, C Coldewey, A Dannemann, K Dierks, W Dorth, G Drews, P Erhard, M Flasiński, I Fleck, A Fürtjes, R Gläser, P Göttlicher, T Haas, L Hagge, W Hain, D Hasell, H Hultschig, G Jahnen, P Joos, M Kasemann, R Klanner, W Koch, U Kötz, H Kowalski, J Labs, A Ladage, B Löhr, M Löwe, D Lüke, J Mainusch, O Manczak, M Momayezi, S Nickel, D Notz, I Park, K-U Pösnecker, M Rohde, E Ros, U Schneekloth, J Schroeder, W Schulz, F Selonke, E Tscheslog, T Tsurugai, F Turkot, W Vogel, T Woeniger, G Wolf, C Youngman, HJ Grabosch, A Leich, A Meyer, C Rethfeldt, S Schlenstedt, R Casalbuoni, S De Curtis, D Dominici, A Francescato, M Nuti, P Pelfer, G Anzivino, R Casaccia, I Laakso, S De Pasquale, S Qian, L Votano, A Bamberger, A Freidhof, T Poser, S Söldner-Rembold, G Theisen, T Trefzger, NH Brook, PJ Bussey, AT Doyle, JR Forbes, VA Jamieson, C Raine, DH Saxon, G Gloth, U Holm, H Kammerlocher, B Krebs, T Neumann, K Wick, A Hofmann, W Kröger, J Krüger, E Lohrmann, J Milewski, M Nakahata, N Pavel, G Poelz, R Salomon, A Seidman, W Schott, BH Wiik, F Zetsche, TC Bacon, I Butterworth, C Markou, D McQuillan, DB Miller, MM Mobayyen, A Prinias, A Vorvolakos, T Bienz, H Kreutzmann, U Mallik, E McCliment, M Roco, MZ Wang, P Cloth, D Filges, L Chen, R Imlay, S Kartik, H-J Kim, RR McNeil, W Metcalf, G Cases, L Hervás, L Labarga, J del Peso, J Roldán, J Terrón, JF de Trocóniz, F Ikraiam, JK Mayer, GR Smith, F Corriveau, DJ Gilkinson, DS Hanna, LW Hung, JW Mitchell, PM Patel, LE Sinclair, DG Stairs, R Ullmann, GL Bashindzhagyan, PF Ermolov, YA Golubkov, VA Kuzmin, EN Kuznetsov, AA Savin, AG Voronin, NP Zotov, S Bentvelsen, A Dake, J Engelen, P de Jong, S de Jong, M de Kamps, P Kooijman, A Kruse, H van der Lugt, V O'Dell, J Straver, A Tenner, H Tiecke, H Uijterwaal, J Vermeulen, L Wiggers, E de Wolf, R van Woudenberg, R Yoshida, B Bylsma, LS Durkin, C Li, TY Ling, KW McLean, WN Murray, SK Park, TA Romanowski, R Seidlein, GA Blair, JM Butterworth, A Byrne, RJ Cashmore, AM Cooper-Sarkar, RCE Devenish, DM Gingrich, PM Hallam-Baker, N Harnew, T Khatri, KR Long, P Luffman, I McArthur, P Morawitz, J Nash, SJP Smith, NC Roocroft, FF Wilson, G Abbiendi, R Brugnera, R Carlin, F Dal Corso, M De Giorgi, U Dosselli, C Fanin, F Gasparini, S Limentani, M Morandin, M Posocco, L Stanco, R Stroili, C Voci, JN Lim, BY Oh, J Whitmore, M Bonori, U Contino, G D'Agostini, M Guida, M Iori, S Mari, G Marini, M Mattioli, D Monaldi, A Nigro, JC Hart, NA McCubbin, TP Shah, TL Short, E Barberis, N Cartiglia, C Heusch, B Hubbard, J Leslie, JST Ng, K O'Shaughnessy, HF Sadrozinski, A Seiden, E Badura, J Biltzinger, H Chaves, M Rost, RJ Seifert, AH Walenta, W Weihs, G Zech, S Dagan, R Heifetz, A Levy, D Zer-Zion, T Hasegawa, M Hazumi, T Ishii, S Kasai, M Kuze, Y Nagasawa, M Nakao, H Okuno, K Tokushuku, T Watanabe, S Yamada, M Chiba, R Hamatsu, T Hirose, S Kitamura, S Nagayama, Y Nakamitsu, M Arneodo, M Costa, MI Ferrero, L Lamberti, S Maselli, C Peroni, A Solano, A Staiano, M Dardo, DC Bailey, D Bandyopadhyay, F Benard, S Bhadra, M Brkic, BD Burow, FS Chlebana, MB Crombie, GF Hartner, GM Levman, JF Martin, RS Orr, JD Prentice, CR Sampson, GG Stairs, RJ Teuscher, T-S Yoon, FW Bullock, CD Catterall, JC Giddings, TW Jones, AM Khan, JB Lane, PL Makkar, D Shaw, J Shulman, K Blankenship, J Kochocki, B Lu, LW Mo, K Charchuła, J Ciborowski, J Gajewski, G Grzelak, M Kasprzak, M Krzyżanowski, K Muchorowski, RJ Nowak, JM Pawlak, K Stojda, A Stopczyński, R Szwed, T Tymieniecka, R Walczak, AK Wróblewski, JA Zakrzewski, AF Żarnecki, M Adamus, H Abramowicz, Y Eisenberg, C Glasman, U Karshon, A Montag, D Revel, EE Ronat, A Shapira, I Ali, B Behrens, U Camerini, S Dasu, C Fordham, C Foudas, A Goussiou, M Lomperski, RJ Loveless, P Nylander, M Ptacek, DD Reeder, WH Smith, S Silverstein, WR Frisken, KM Furutani, Y Iga
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Neutral strange particle production in antineutrino-neon charged current interactions

Zeitschrift für Physik C Particles and Fields 53:2 (1992) 207-217

Authors:

S Willocq, P Marage, M Aderholz, P Allport, JP Baton, M Berggren, EF Clayton, AM Cooper-Sarkar, O Erriquez, PJW Faulkner, J Guy, PO Hulth, GT Jones, MM Mobayyen, DRO Morrison, M Neveu, S O'Neale, J Sacton, RA Sansum, K Varvell, W Venus, J Wells, W Wittek

Abstract:

Neutral strange particle production in {Mathematical expression} Ne charged current interactions is studied using the bubble chamber BEBC, exposed to the CERN SPS antineutrino wide band beam. From a sample of 1191 neutral strange particles, the inclusive production rates are determined to be (15.7±0.8)% for K0 mesons, (8.2±0.5)% for Λ, (0.4±0.2)% for {Mathematical expression} and (0.6±0.3)% for Σ0 hyperons. The inclusive production properties of K0 mesons and Λ hyperons are investigated. The Λ hyperons are found to be polarized in the production plane. © 1992 Springer-Verlag.
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Bound on the tau neutrino magnetic moment from the BEBC beam dump experiment

Physics Letters B 280:1-2 (1992) 153-158

Authors:

AM Cooper-Sarkar, S Sarkar, J Guy, W Venus, PO Hulth, K Hultqvist

Abstract:

We have searched for electrons scattered in the forward direction by neutrinos produced by dumping a 400 GeV/c proton beam on a copper target. We estimate the number of tau neutrinos produced from the decays of Ds mesons in the dump. The data limit the possible magnetic moment of tau neutrinos to be below 5.4×10-7 ωB. This rules out the suggestion that tau neutrinos of mass O(MeV) constitute the dark matter in the universe. © 1992.
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