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Title: Proton-{lambda} correlations in central Au+Au collisions at {radical}(s{sub NN})=200 GeV

Abstract

We report on p-{lambda},p-{lambda},p-{lambda}, and p-{lambda} correlation functions constructed in central Au-Au collisions at {radical}(s{sub NN})=200 GeV by the STAR experiment at RHIC. The proton and lambda source size is inferred from the p-{lambda} and p-{lambda} correlation functions. It is found to be smaller than the pion source size also measured by the STAR experiment at smaller transverse masses, in agreement with a scenario of a strong universal collective flow. The p-{lambda} and p-{lambda} correlation functions, which are measured for the first time, exhibit a large anticorrelation. Annihilation channels and/or a negative real part of the spin-averaged scattering length must be included in the final-state interactions calculation to reproduce the measured correlation function.

Authors:
; ; ; ; ; ;  [1]; ; ; ; ;  [2]; ; ; ; ; ; ; ;  [3]
  1. University of Birmingham, Birmingham (United Kingdom)
  2. Panjab University, Chandigarh 160014 (India)
  3. Variable Energy Cyclotron Centre, Kolkata 700064 (India) (and others)
Publication Date:
OSTI Identifier:
20864228
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 74; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.74.064906; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANNIHILATION; BROOKHAVEN RHIC; CORRELATION FUNCTIONS; CORRELATIONS; FINAL-STATE INTERACTIONS; GEV RANGE; GOLD 197 REACTIONS; LAMBDA BARYONS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PIONS; PROTONS; SCATTERING LENGTHS; SPIN

Citation Formats

Adams, J., Barnby, L. S., Blyth, C. O., Gaillard, L., Jones, P. G., Nelson, J. M., Timmins, A. R., Aggarwal, M. M., Bhati, A. K., Bhatia, V. S., Kumar, A., Sharma, M., Ahammed, Z., Chattopadhyay, S., Das, D., Das, S., Mazumdar, M. R. Dutta, Ganti, M. S., Ghosh, P., and Mohanty, B. Proton-{lambda} correlations in central Au+Au collisions at {radical}(s{sub NN})=200 GeV. United States: N. p., 2006. Web. doi:10.1103/PHYSREVC.74.064906.
Adams, J., Barnby, L. S., Blyth, C. O., Gaillard, L., Jones, P. G., Nelson, J. M., Timmins, A. R., Aggarwal, M. M., Bhati, A. K., Bhatia, V. S., Kumar, A., Sharma, M., Ahammed, Z., Chattopadhyay, S., Das, D., Das, S., Mazumdar, M. R. Dutta, Ganti, M. S., Ghosh, P., & Mohanty, B. Proton-{lambda} correlations in central Au+Au collisions at {radical}(s{sub NN})=200 GeV. United States. doi:10.1103/PHYSREVC.74.064906.
Adams, J., Barnby, L. S., Blyth, C. O., Gaillard, L., Jones, P. G., Nelson, J. M., Timmins, A. R., Aggarwal, M. M., Bhati, A. K., Bhatia, V. S., Kumar, A., Sharma, M., Ahammed, Z., Chattopadhyay, S., Das, D., Das, S., Mazumdar, M. R. Dutta, Ganti, M. S., Ghosh, P., and Mohanty, B. Fri . "Proton-{lambda} correlations in central Au+Au collisions at {radical}(s{sub NN})=200 GeV". United States. doi:10.1103/PHYSREVC.74.064906.
@article{osti_20864228,
title = {Proton-{lambda} correlations in central Au+Au collisions at {radical}(s{sub NN})=200 GeV},
author = {Adams, J. and Barnby, L. S. and Blyth, C. O. and Gaillard, L. and Jones, P. G. and Nelson, J. M. and Timmins, A. R. and Aggarwal, M. M. and Bhati, A. K. and Bhatia, V. S. and Kumar, A. and Sharma, M. and Ahammed, Z. and Chattopadhyay, S. and Das, D. and Das, S. and Mazumdar, M. R. Dutta and Ganti, M. S. and Ghosh, P. and Mohanty, B.},
abstractNote = {We report on p-{lambda},p-{lambda},p-{lambda}, and p-{lambda} correlation functions constructed in central Au-Au collisions at {radical}(s{sub NN})=200 GeV by the STAR experiment at RHIC. The proton and lambda source size is inferred from the p-{lambda} and p-{lambda} correlation functions. It is found to be smaller than the pion source size also measured by the STAR experiment at smaller transverse masses, in agreement with a scenario of a strong universal collective flow. The p-{lambda} and p-{lambda} correlation functions, which are measured for the first time, exhibit a large anticorrelation. Annihilation channels and/or a negative real part of the spin-averaged scattering length must be included in the final-state interactions calculation to reproduce the measured correlation function.},
doi = {10.1103/PHYSREVC.74.064906},
journal = {Physical Review. C, Nuclear Physics},
number = 6,
volume = 74,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}