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

Prof Roman Walczak

Emeritus Professor

Research theme

  • Accelerator physics
  • Lasers and high energy density science
  • Plasma physics

Sub department

  • Particle Physics

Research groups

  • Laser-plasma accelerator group
Roman.Walczak@physics.ox.ac.uk
Denys Wilkinson Building, room 659
  • About
  • Publications

Initial study of deep inelastic scattering with ZEUS at HERA

Physics Letters B 303:1-2 (1993) 183-197

Authors:

M Derrick, D Krakauer, S Magill, B Musgrave, J Repond, S Repond, R Stanek, RL Talaga, J Thron, F Arzarello, R Ayad, G Barbagli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, 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, J Crittenden, H Dabbous, K Desch, B Diekmann, T Doeker, 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, D Monaldi, H Müsch, E Paul, R Schattevoy, 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, T Barillari, M Schioppa, G Susinno, A Bernstein, A Caldwell, I Gialas, JA Parsons, S Ritz, F Sciulli, PB Straub, L Wai, S Yang, W Burkot, A Eskreys, K Piotrzkowski

Abstract:

Results are presented on neutral current, deep inelastic scattering measured in collisions of 26.7 GeV electrons and 820 GeV protons. The events typically populate a range in Q2 from 10 to 100 GeV2. The values of x extend down to x ∼ 10-4 which is two orders of magnitude lower than previously measured at such Q2 values in fixed target experiments. The measured cross sections are in accord with the extrapolations of current parametrisations of parton distributions. © 1993.

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.

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

Intercalibration of the ZEUS high resolution and backing calorimeters

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 313:1-2 (1992) 126-134

Authors:

H Abramowicz, H Czyrkowski, A Derlicki, TZ Kowalski, M Krzyżanowski, I Kudla, W Kuśmierz, RJ Nowak, JM Pawlak, A Rajca, A Stopczyński, R Walczak, AF Żarnecki

A MEASUREMENT OF IOTA-TOT(GAMMA-P) AT ROOT-S=210GEV

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 AVED, 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 DAURIA, C DELPAPA, 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, YZ 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 KUCKES, A MASS, S MENGEL, J MOLLEN, H MUSCH, 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 DWURAZNY, A ESKREYS, B NIZIOL, Z JAKUBOWSKI, K PIOTRZKOWSKI, M ZACHARA, L ZAWIEJSKI, P BORZEMSKI, K ESKREYS, K JELEN, D KISIELEWSKA, T KOWALSKI, J KULKA, E RULIKOWSKAZAREBSKA, L SUSZYCKI, J ZAJAC, T KEDZIERSKI, A KOTANSKI, M PRZYBYCIEN, LAT BAUERDICK, U BEHRENS, JK BIENLEIN, C COLDEWEY, A DANNEMANN, K DIERKS, W DORTH, G DREWS, P ERHARD, M FLASINSKI, I FLECK, A FURTJES, R GLASER, P GOTTLICHER, T HAAS, L HAGGE, W HAIN, D HASELL, H HULTSCHIG, G JAHNEN, 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, M MOMAYEZI, S NICKEL, D NOTZ, I PARK, KU POSNECKER, 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 DECURTIS, D DOMINICI, A FRANCESCATO, M NUTI, P PELFER, G ANZIVINO, R CASACCIA, I LAAKSO, S DEPASQUALE, S QIAN, L VOTANO, A BAMBERGER, A FREIDHOF, T POSER, S SOLDNERREMBOLD, 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 KROGER, J KRUGER, 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, HJ KIM, RR MCNEIL, W METCALF, G CASES, L HERVAS, L LABARGA, J DELPESO, J ROLDAN, J TERRON, JF DETROCONIZ, 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 DEJONG, S DEJONG, M DEKAMPS, P KOOIJMAN, A KRUSE, H VANDERLUGT, V ODELL, J STRAVER, A TENNER, H TIECKE, H UIJTERWAAL, J VERMEULEN, L WIGGERS, E DEWOLF, R VANWOUDENBERG, 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 COOPERSARKAR, RCE DEVENISH, DM GINGRICH, PM HALLAMBAKER, N HARNEW, T KHATRI, KR LONG, P LUFFMAN, J MCARTHUR, P MORAWITZ, J NASH, SJP SMITH, NC ROOCROFT, FF WILSON, G ABBIENDI, R BRUGNERA, R CARLIN, F DALCORSO, M DEGIORGI, U DOSSELLI, C FANIN, F GASPARINI, S LIMENTANI, M MORANDIN, M POSOCCO, J STANCO, R STROILI, C VOCI, JN LIM, BY OH, J WHITMORE, M BONORI, U CONTINO, G DAGOSTINI, 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 OSHAUGHNESSY, 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 ZERZION, 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, TS 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 CHARCHULA, J CIBOROWSKI, J GAJEWSKI, G GRZELAK, M KASPRZAK, M KRZYZANOWSKI, K MUCHOROWSKI, RJ NOWAK, JM PAWLAK, K STOJDA, A STOPCZYNSKI, R SZWED, T TYMIENIECKA, R WALCZAK, AK WROBLEWSKI, JA ZAKRZEWSKI, AF ZARNECKI, 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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