Professor Amanda Cooper-Sarkar: Publications

Spin alignment of ρ⁰ mesons produced in antineutrino and neutrino neon charged-current interactions

Physics Letters B 187:1-2 (1987) 179-184

Authors:

W Wittek, J Guy, M Adeholz, P Allport, JP Baton, M Berggren, D Bertrand, V Brisson, FW Bullock, W Burkot, M Calicchio, EF Clayton, T Coghen, AM Cooper-Sarkar, O Erriquez, PJ Fitch, MT Fogli-Muciaccia, PO Hulth, GT Jones, P Kasper, H Klein, P Marage, RP Middleton, DB Miller, MM Mobayyen, DRO Morrison, M Neveu, SW O'Neale, MA Parker, P Petiau, J Sacton, RA Sansum, N Schmitz, E Simopoulou, C Vallee, K Varvell, A Vayaki, W Venus, H Wachsmuth, J Wells

Abstract:

In a bubble chamber experiment with BEBC the spin alignment parameter η= 1 2 (2ρ{variant}00 - ρ{variant}11 - ρ{variant}-1-1) is measured for ρ{variant}0 mesons produced in deep inelastic charged-current antineutrino and neutrono interactions on neon. In the current fragmentation region η is found to be ηv=0.48±0.27 (stat.)±0.15 (syst.) for vNe and ηv=0.12±0.20 (stat.)±0.10 (syst.) for vNe interactions. © 1987.

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Measurement of the structure functions F2 and xF3 and comparison with QCD predictions including kinematical and dynamical higher twist effects

Zeitschrift für Physik C Particles and Fields 36:1 (1987) 1-13

Authors:

K Varvell, AM Cooper-Sarkar, MA Parker, RA Sansum, M Aderholz, N Armenise, JP Baton, FW Bullock, M Berggren, D Bertrand, V Brisson, W Burkot, M Calcchio, EF Claytoh, T Coghen, O Erriquez, PJ Fitch, G Gerbier, J Guy, PO Hulth, G Iaselli, GT Jones, P Kasper, H Klein, C Kochowski, P Marage, M Mermikides, RP Middleton, DRO Morrison, MM Mobayyen, S Natali, M Neveu, S Nuzzo, SW O'Neale, P Petiau, A Petrides, F Ruggieri, J Sacton, E Simopoulou, C Vallee, A Vayaki, WA Venus, H Wachsmuth, J Wells, W Wittek

Abstract:

The isoscalar nucleon structure functions F2(x, Q2) and xF3(x, Q2) are measured in the range 0

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Search for tau-neutrino interactions in the BEBC beam dump experiment

Nuclear Physics, Section B 291:C (1987) 503-515

Authors:

M Talebzadeh, J Guy, W Venus, M Aderholz, KWJ Barnham, P Bostock, EF Clayton, AM Cooper-Sarkar, ML Faccini-Turluer, H Grässler, K Hultquist, PO Hulth, H Kreutzmann, J Krstic, DB Miller, MM Mobayyen, G Myatt, B Nellen, MA Parker, N Schmitz, S Sewell, E Simopoulou, A Vayaki, D Vignaud, H Wachsmuth, W Wittek, B Wünsch

Abstract:

A novel and efficient kinematic method is used to estimate the number of ντ charged current interactions with Eν > 20 GeV in the BEBC beam dump experiment. The result, -14±12 ντ events, is consistent with zero. The ratio of Ds to D meson production in 400 GeV proton interactions in copper is estimated to be below 0.65 at 90% c.l. The oscillation probability P(νe→ντ) averaged over the electron-(anti)neutrino spectrum is found to be below 18%. The hypothesis that νe and ντ are identical is excluded by about 6 standard deviations. A remarkable event is described: it contains a muon, a high pT photon and a high pT hadron. © 1987.

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Prompt neutrino production in 400 GeV proton copper interactions

Nuclear Physics, Section B 273:2 (1986) 253-274

Authors:

H Grässler, W Dröge, U Idschok, H Kreutzmann, B Nellen, B Wünsch, AM Cooper-Sarkar, DC Cundy, H Foeth, A Grant, GG Harigel, H Klein, DRO Morrison, M Nikolić, L Pape, MA Parker, P Schmid, H Wachsmuth, M Dris, E Simopoulou, A Vayaki, KWJ Barnham, DB Miller, MM Mobayyen, M Talebzadeh, M Aderholz, L Deck, N Schmitz, W Wittek, P Bostock, J Krstić, G Myatt, D Radojicić, J Guy, W Venus, T Bolognese, ML Faccini-Turluer, D Vignaud, PO Hulth, K Hultqvist, C Walck

Abstract:

The prompt electron neutrino and muon neutrino fluxes from proton copper interactions at 400 GeV/c proton momentum have been measured. The asymmetry between the prompt electron (anti) neutrino and the prompt muon (anti) neutrino event rates above 20 GeV is Aeμ = (Ne - Nμ (Nc + Nμ) = 0.07 ± 0.08 corresponding to an Ne/Nμ ratio of 1.14-0.16-0.19. The cross section weighted charge asymmetry for electrons and muons combined is Aνν = 0.15 ± 0.08. The number of D decays into νe and νμ is (4.1 ± 0.9) × 10-4 per incident proton. No evidence for ντ interactions was found. © 1986.

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Measurement of total cross sections for neutrino and antineutrino charged-current interactions in hydrogen and neon

Physics Letters B 173:2 (1986) 211-216

Authors:

M Aderholz, G Corrigan, E Hoffmann, GT Jones, RWL Jones, BW Kennedy, DB Miller, MM Mobayyen, DRO Morrison, G Myatt, D Radojicic, P Schmid, N Schmitz, PN Shotton, SJ Towers, W Wittek, KWJ Barnham, JP Baton, M Berggren, D Bertrand, FW Bullock, M Calicchio, EF Clayton, T Coghen, AM Cooper-Sarkar, O Erriquez, PJ Fitch, MT Fogli-Muciaccia, JG Guy, F Hamisi, PO Hulth, P Kasper, H Klein, M Lagraa, P Marage, RP Middleton, SW O'Neale, MA Parker, J Sacton, RA Sansum, E Simopoulou, C Vallée, K Varvell, A Vayaki, W Venus, H Wachmuth, J Wells

Abstract:

BEBC filled in turn with hydrogen, and with a neon-hydrogen mixture, was exposed to the CERN SPS wide band neutrino and antineutrino beams. The ratios of the charged-current cross sections per nucleon, σ(νH2) σ(νNe) and σ(νH2) σ(νNe), between 20 and 300 GeV were found to be 0.656 ± 0.020 and 1.425 ± 0.052, respectively. Multiplying these ratios by the revised cross sections in neon, σ(νNe) E = (0.723 ± 0.038) × 10-38 cm2/GeV per nucleon and σ(νNe) E = (0.351 ± 0.019) × 10-38 cm2/GeV per nucleon, and their ratio, σ(νNe) σ(νNe) = 0.485 ± 0.020,, yields values for the total charged-current cross sections on protons, σ(νp)/E and σ(νp) E, of (0.474 ± 0.029) × 10-38 cm2/GeV and (0.500 ± 0.032) × 10-38 cm2/GeV. respectively, and a value for the ratio σ(νp) σ(νp) of 1.053 ± 0.066. © 1986.

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Professor Amanda Cooper-Sarkar

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Spin alignment of ρ⁰ mesons produced in antineutrino and neutrino neon charged-current interactions

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Abstract:

Measurement of the structure functions F2 and xF3 and comparison with QCD predictions including kinematical and dynamical higher twist effects

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Search for tau-neutrino interactions in the BEBC beam dump experiment

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Prompt neutrino production in 400 GeV proton copper interactions

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Measurement of total cross sections for neutrino and antineutrino charged-current interactions in hydrogen and neon

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Professor Amanda Cooper-Sarkar

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Spin alignment of ρ0 mesons produced in antineutrino and neutrino neon charged-current interactions

Authors:

Abstract:

Measurement of the structure functions F2 and xF3 and comparison with QCD predictions including kinematical and dynamical higher twist effects

Authors:

Abstract:

Search for tau-neutrino interactions in the BEBC beam dump experiment

Authors:

Abstract:

Prompt neutrino production in 400 GeV proton copper interactions

Authors:

Abstract:

Measurement of total cross sections for neutrino and antineutrino charged-current interactions in hydrogen and neon

Authors:

Abstract:

Spin alignment of ρ⁰ mesons produced in antineutrino and neutrino neon charged-current interactions