Pion femtoscopy in p+p collisions at √s=200 GeV

Madan M. Aggarwal,Zubayer Ahammed, A. V. Alakhverdyants,I. G. Alekseev,J. Alford, B. D. Anderson,D. Arkhipkin,G. S. Averichev,J. Balewski,Lee Stuart Barnby,S. Baumgart,D. R. Beavis,R. Bellwied, Michael Joseph Betancourt,Russell Richard Betts,Anju Bhasin,A. K. Bhati, H. Bichsel,Jaroslav Bielcik,Jana Bielcikova, B. Biritz,L. C. Bland,B. E. Bonner,J. Bouchet,Ermes Braidot,A. V. Brandin,A. Bridgeman,Elena Bruna,S. Bueltmann,I. Bunzarov,T. P. Burton,X. Z. Cai,H. Caines,M. Calderon De La Barca Sanchez, O. Catu, D. Cebra,R. Cendejas,M. C. Cervantes,Z. Chajecki,P. Chaloupka,S. Chattopadhyay,H. F. Chen,J. H. Chen,Jake Y. Chen,J. Cheng,M. Cherney, A. Chikanian,Ki-Seok Choi,W. Christie,P. Chung,R. F. Clarke,M. J. M. Codrington,R. Corliss,J. G. Cramer,H. J. Crawford,Debasish Das, S. Dash,A. Davila Leyva,L. C. De Silva,R. R. Debbe,T. G. Dedovich,A. A. Derevschikov,R. Derradi de Souza,L. Didenko,P. Djawotho,S. M. Dogra,X. Dong, J. L. Drachenberg,J. E. Draper,J. C. Dunlop,M. R. Dutta Mazumdar,L. G. Efimov, E. Elhalhuli,M. Elnimr, J. Engelage,G. Eppley,B. Erazmus,M. Estienne,L. Eun,Olga Evdokimov, P. Fachini,R. Fatemi, J. Fedorisin, R. G. Fersch,P. Filip,E. Finch,V. Fine,Y. Fisyak,C. A. Gagliardi,D. R. Gangadharan, M. S. Ganti,E. J. Garcia-Solis, A. Geromitsos,Frank Jm Geurts,V. Ghazikhanian,Premomoy Ghosh,Y. N. Gorbunov, A. Gordon,O. G. Grebenyuk, D. Grosnick

Physical Review C（2011）

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摘要

The STAR Collaboration at the BNL Relativistic Heavy Ion Collider has measured two-pion correlation functions from p + p collisions at root s = 200 GeV. Spatial scales are extracted via a femtoscopic analysis of the correlations, though this analysis is complicated by the presence of strong nonfemtoscopic effects. Our results are put into the context of the world data set of femtoscopy in hadron-hadron collisions. We present the first direct comparison of femtoscopy in p + p and heavy ion collisions, under identical analysis and detector conditions.

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