Prof Roman Walczak: Publications

A measurement of the Ds lifetime

Zeitschrift Fur Physik C Particles and Fields 35:3 (1987) 317-321

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, P Rosskamp, B Bock, J Eisenmann, HM Fischer, H Hartmann, E Hilger, A Jocksch, V Mertens, R Wedemeyer, B Foster, AJ Martin, AJ Sephton, E Bernardi, Y Eisenberg, A Eskreys, K Gather, H Hultschig, K Genser, P Joos, U Karshon, B Klima, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, A Montag, D Notz, J Pawlak, D Trines, T Tymieniecka, R Walczak, G Wolf, W Zeuner, A Kolanoski, T Kracht, J Krüger, E Lohrmann, G Poelz, KU Poesnecker, DM Binnie, JK Sedgbeer, J Shulman, D Su, AT Watson, F Barreiro, A Leites, J del Peso, E Ros, C Balkwill, MG Bowler, PN Burrows, RJ Cashmore, P Dauncey, GP Heath, DJ Mellor, P Ratoff, I Tomalin, JM Yelton, SL Lloyd, GE Forden, JC Hart, DK Hasell, DH Saxon, S Brandt, M Holder, L Labarga, B Neumann, G Mikenberg, R Mir, D Revel, E Ronat, A Shapira, N Wainer, G Yekutieli, G Baranko, A Caldwell, M Cherney, JM Izen, D Muller, S Ritz, D Strom, M Takashima, E Wicklund, SL Wu, G Zobernig

Abstract:

The lifetime of the Ds meson has been measured using the TASSO detector at PETRA and found to be (5.7-2.6 ^+3.6±0.9)×10^-13 s. The method used was to reconstruct fully the decay vertex of the channel Ds→φ{symbol}π^±, φ{symbol}→K⁺K^-. © 1987 Springer-Verlag.

More details from the publisher

More details

Multiplicity dependence of transverse momentum spectra in pp,p̄p, dd and αα collisions at ISR energies

Physics Letters B Elsevier 183:2 (1987) 227-231

Authors:

A Breakstone, R Campanini, G Claesson, HB Crawley, M Cuffiani, GM Dallavalle, MM Deninno, K Doroba, D Drijard, F Fabbri, A Firestone, MA Faessler, HG Fischer, H Floege, SY Fung, H Frehse, S Garpman, W Geist, L Gesswein, G Giacomelli, R Gokieli, M Gorbics, M Gorski, CR Gruhn, P Hanke, M Heiden, W Herr, D Isenhower, TJ Ketel, EE Kluge, JW Lamsa, T Lohse, I Lund, R Mankel, WT Meyer, T Nakada, I Otterlund, M Panter, H Pugh, A Putzer, K Rauschnabel, B Rensch, F Rimondi, M Schmelling, L Schroeder, GP Siroli, R Sosnowski, E Stenlund, TJM Symons, M Szczekowski, R Szwed, O Ullaland, R Walczak, D Wegener, M Wunsch

More details from the publisher

The influence of gas composition, cathode material and geometrical parameters on the operation of a thin multiwire chamber working at high amplification

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 253:2 (1987) 264-272

Authors:

Krzysztof Genser, Roman Walczak

More details from the publisher

Measurement of the photon structure function F2^ψ at Q² from 7 to 70 (GeV/c)²

Zeitschrift für Physik C Particles and Fields 31:4 (1986) 527-535

Authors:

M Althoff, W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, P Rosskamp, W Wallraff, B Bock, J Eisenmann, HM Fischer, H Hartmann, W Hillen, A Jocksch, H Kolanoski, H Kück, V Mertens, R Wedemeyer, B Foster, E Bernardi, Y Eisenberg, A Eskreys, K Gather, H Hultschig, P Joos, B Klima, H Kowalski, A Ladage, B Löhr, D Lueke, P Mättig, D Notz, D Revel, E Ronat, D Trines, T Tymieniecka, R Walczak, G Wolf, W Zeuner, E Hilger, T Kracht, HL Krasemann, J Krüger, E Lohrmann, G Poelz, KU Pösnecker, DM Binnie, PJ Dornan, DA Garbutt, C Jenkins, WG Jones, JK Sedgbeer, D Su, J Thomas, WATW Abdullah, F Barreiro, E Ros, MG Bowler, P Bull, RJ Cashmore, P Dauncey, R Devenish, G Heath, DJ Mellor, SL Lloyd, GE Forden, JC Hart, DK Hasell, DH Saxon, S Brandt, M Dittmar, M Holder, L Labarga, B Neumann, U Karshon, G Mikenberg, A Montag, R Mir, A Shapira, G Yekutieli, G Baranko, A Caldwell, M Cherney, JM Izen, S Ritz, D Strom, M Takashima, H Venkataramania, E Wicklund, SL Wu, G Zobernig

Abstract:

We have measured the process e+e-→e+e-+hadrons, where one of the scattered electrons was detected at large angles, with Q2 ranging from 7 to 70 (VeV/c)2. The photon structure function F2γ(x, Q2) was determined at an average Q2 of 23 (GeV/c)2. The measurements were compared to theoretical predictions of the Quark Parton Model and Quantum Chromodynamics. In both models a hadronic part was added. Within the errors the data are in agreement with the QPM using quark masses of 300 MeV/c2 for the light quarks. The data also agree with a QCD calculation including higher order corrections. A fit yielded a {Mathematical expression} value of 140-65+190 MeV, where the errors include statistical and systematic uncertainties. © 1986 Springer-Verlag.

More details from the publisher

More details

Measurement of the radiative width of the A2(1320) in two-photon interactions

Zeitschrift Fur Physik C Particles and Fields 31:4 (1986) 537-543

Authors:

M Althoff, W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, P Rosskamp, W Wallraff, B Bock, J Eisenmann, HM Fischer, H Hartmann, A Jocksch, H Kolanoski, H Kück, V Mertens, R Wedemeyer, B Foster, E Bernardi, Y Eisenberg, A Eskreys, K Gather, H Hultschig, P Joos, B Klima, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, D Notz, D Revel, E Ronat, D Trines, T Tymieniecka, R Walczak, G Wolf, W Zeuner, E Hilger, T Kracht, HL Krasemann, J Krüger, E Lohrmann, G Poelz, KU Pösnecker, DM Binnie, PJ Dornan, DA Garbutt, C Jenkins, WG Jones, JK Sedgbeer, D Su, J Thomas, WAT Wan Abdullah, F Barreiro, E Ros, MG Bowler, P Bull, RJ Cashmore, P Dauncey, R Devenish, G Heath, D Mellor, P Ratoff, SL Lloyd, GE Forden, JC Hart, DK Hasell, DH Saxon, S Brandt, M Holder, L Labarga, B Neumann, U Karshon, G Mikenberg, R Mir, A Montag, A Shapira, G Yekutieli, G Baranko, A Caldwell, M Cherney, JM Izen, S Ritz, D Strom, M Takashima, E Wicklund, SL Wu, G Zonering

Abstract:

The reaction e⁺e^-→e⁺e^- A2 (1320) has been observed by detecting the decay A2→π⁺,π^-π⁰. The two-photon width of the A2 has been measured to be G{cyrillic}(A2→γγ)=(0.09±0.27 (stat)±0.16 (syst)) keV. The cross section σ(γγ→π⁺,π^-π⁰ has been determined outside the A2 resonance region. © 1986 Springer-Verlag.

More details from the publisher

More details

Prof Roman Walczak

Research theme

Sub department

A measurement of the Ds lifetime

Authors:

Abstract:

Multiplicity dependence of transverse momentum spectra in pp,p̄p, dd and αα collisions at ISR energies

Authors:

The influence of gas composition, cathode material and geometrical parameters on the operation of a thin multiwire chamber working at high amplification

Authors:

Measurement of the photon structure function F2^ψ at Q² from 7 to 70 (GeV/c)²

Authors:

Abstract:

Measurement of the radiative width of the A2(1320) in two-photon interactions

Authors:

Abstract:

FIND US

CONTACT US

Prof Roman Walczak

Research theme

Sub department

Research groups

A measurement of the Ds lifetime

Authors:

Abstract:

Multiplicity dependence of transverse momentum spectra in pp,p̄p, dd and αα collisions at ISR energies

Authors:

The influence of gas composition, cathode material and geometrical parameters on the operation of a thin multiwire chamber working at high amplification

Authors:

Measurement of the photon structure function F2ψ at Q2 from 7 to 70 (GeV/c)2

Authors:

Abstract:

Measurement of the radiative width of the A2(1320) in two-photon interactions

Authors:

Abstract:

Measurement of the photon structure function F2^ψ at Q² from 7 to 70 (GeV/c)²