TY - JOUR
T1 - Measurements of inclusive Δ̄° production with large χF at the Spp̄S collider
AU - Brandt, A.
AU - Erhan, S.
AU - Kuzucu, A.
AU - Medinnis, M.
AU - Ozdes, N.
AU - Schlein, P. E.
AU - Zeyrek, M. T.
AU - Zweizig, J. G.
AU - Chèze, J. B.
AU - Zsembery, J.
N1 - Funding Information:
* Supported by U.S. National Science Foundation Grant PHY94-23142. 1 Now at Fermi National Accelerator Laboratory, Batavia, Illinois, USA. 2 Visitor from Cukurova University, Adana, Turkey. Also supported by ICSC - World Lab. 3 Present address: DESY, Zeuthen, Germany. 4 E-maih zeyrek@rorqual.ee.metu.edu.tr, visitor from Middle East Tech. Univ., Ankara, Turkey. Supported by TUBITAK. 5 Present address: DESY, Hamburg, Germany.
Funding Information:
We are grateful to the CERN administration for their continued support. We also thank the UA2 collaboration for allowing us to use their data acquisition system for the measurements reported here. M.T.Z. thanks the Scientific & Technical Research Council of Turkey (TUBITAK) for support as a Ph.D. Fellow during his stay at CERN. A.K. and N.O. wish to thank Cukurova University, TUBITAK and ICSC-World Lab for their support.
PY - 1998/5/18
Y1 - 1998/5/18
N2 - We report results of inclusive measurements of Δ̄° s, produced in the forward direction at the Spp̄S with √s = 630 GeV, using the UA8 small angle Roman Pot spectrometers. These measurements cover the range in Feynman-χF and transverse momentum, 0,6 < χF < 1.0 and 0.4 < p1 < 0.7 GeV, respectively. Within a systematic uncertainty of ±20% on the absolute cross section measurements, the results are indistinguishable from those made by some of us in two earlier experiments at the CERN Intersecting Storage Rings, with energies, √s = 53 and 62 GeV. In the χF-range, 0.6-0.9, the absolute cross sections are lower by a factor of 2 to 3 than the predictions of the Lund model as embodied in the PYTHIA 5.6 and JETSET 7.3 Monte Carlo programs, indicating inadequacies in knowledge of the baryon fragmentation function. For the largest χF-range, 0.9-1.0, the measurements agree with the Monte Carlo predictions. We have measured the average Δ̄° polarization for our events and find (6 ± 12%), consistent with previous measurements at the ISR in the present region of χF-p1,.
AB - We report results of inclusive measurements of Δ̄° s, produced in the forward direction at the Spp̄S with √s = 630 GeV, using the UA8 small angle Roman Pot spectrometers. These measurements cover the range in Feynman-χF and transverse momentum, 0,6 < χF < 1.0 and 0.4 < p1 < 0.7 GeV, respectively. Within a systematic uncertainty of ±20% on the absolute cross section measurements, the results are indistinguishable from those made by some of us in two earlier experiments at the CERN Intersecting Storage Rings, with energies, √s = 53 and 62 GeV. In the χF-range, 0.6-0.9, the absolute cross sections are lower by a factor of 2 to 3 than the predictions of the Lund model as embodied in the PYTHIA 5.6 and JETSET 7.3 Monte Carlo programs, indicating inadequacies in knowledge of the baryon fragmentation function. For the largest χF-range, 0.9-1.0, the measurements agree with the Monte Carlo predictions. We have measured the average Δ̄° polarization for our events and find (6 ± 12%), consistent with previous measurements at the ISR in the present region of χF-p1,.
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U2 - 10.1016/S0550-3213(98)00168-0
DO - 10.1016/S0550-3213(98)00168-0
M3 - Article
AN - SCOPUS:0032542998
VL - 519
SP - 3
EP - 18
JO - Nuclear Physics B
JF - Nuclear Physics B
SN - 0550-3213
IS - 1-2
ER -