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Title: Proton-{Lambda} correlations in central Au+Au collisions at {radical}{ovr s}{sub NN} = 200 GeV.

Abstract

We report on p-{Lambda}, p-{bar {Lambda}}, {bar p}-{Lambda}, and {bar p}-{bar {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 {bar p}-{bar {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-{bar {Lambda}} and {bar 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:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); Swiss NSF
OSTI Identifier:
966338
Report Number(s):
ANL-HEP-PR-09-66
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US0903945
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. C; Journal Volume: 74; Journal Issue: 74 ; 2006
Country of Publication:
United States
Language:
ENGLISH
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANNIHILATION; CORRELATION FUNCTIONS; FINAL-STATE INTERACTIONS; PIONS; PROTONS; SCATTERING LENGTHS

Citation Formats

Cadman, R.V., Krueger, K., Spinka, H. M., McClain, C. J., Underwood, D. G., Adams, J., Aggarwal, M. M., Ahammed, Z., Amonett, J., Anderson, B. D., STAR Collaboration, High Energy Physics, Univ. of Birmingham, Panjab Univ., Variable Energy Cyclotron Centre, and Kent State Univ. Proton-{Lambda} correlations in central Au+Au collisions at {radical}{ovr s}{sub NN} = 200 GeV.. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.74.064906.
Cadman, R.V., Krueger, K., Spinka, H. M., McClain, C. J., Underwood, D. G., Adams, J., Aggarwal, M. M., Ahammed, Z., Amonett, J., Anderson, B. D., STAR Collaboration, High Energy Physics, Univ. of Birmingham, Panjab Univ., Variable Energy Cyclotron Centre, & Kent State Univ. Proton-{Lambda} correlations in central Au+Au collisions at {radical}{ovr s}{sub NN} = 200 GeV.. United States. doi:10.1103/PhysRevC.74.064906.
Cadman, R.V., Krueger, K., Spinka, H. M., McClain, C. J., Underwood, D. G., Adams, J., Aggarwal, M. M., Ahammed, Z., Amonett, J., Anderson, B. D., STAR Collaboration, High Energy Physics, Univ. of Birmingham, Panjab Univ., Variable Energy Cyclotron Centre, and Kent State Univ. Sun . "Proton-{Lambda} correlations in central Au+Au collisions at {radical}{ovr s}{sub NN} = 200 GeV.". United States. doi:10.1103/PhysRevC.74.064906.
@article{osti_966338,
title = {Proton-{Lambda} correlations in central Au+Au collisions at {radical}{ovr s}{sub NN} = 200 GeV.},
author = {Cadman, R.V. and Krueger, K. and Spinka, H. M. and McClain, C. J. and Underwood, D. G. and Adams, J. and Aggarwal, M. M. and Ahammed, Z. and Amonett, J. and Anderson, B. D. and STAR Collaboration and High Energy Physics and Univ. of Birmingham and Panjab Univ. and Variable Energy Cyclotron Centre and Kent State Univ.},
abstractNote = {We report on p-{Lambda}, p-{bar {Lambda}}, {bar p}-{Lambda}, and {bar p}-{bar {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 {bar p}-{bar {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-{bar {Lambda}} and {bar 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 = {Phys. Rev. C},
number = 74 ; 2006,
volume = 74,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}