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Measurement of nonrandom event-by-event fluctuations of average transverse momentum in square root of (sNN)=200 GeV Au+Au and p+p collisions |
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| Authors: | Adler S S Afanasiev S Aidala C Ajitanand N N Akiba Y Alexander J Amirikas R Aphecetche L Aronson S H Averbeck R Awes T C Azmoun R Babintsev V Baldisseri A Barish K N Barnes P D Bassalleck B Bathe S Batsouli S Baublis V Bazilevsky A Belikov S Berdnikov Y Bhagavatula S Boissevain J G Borel H Borenstein S Brooks M L Brown D S Bruner N Bucher D Buesching H Bumazhnov V Bunce G Burward-Hoy J M Butsyk S Camard X Chai J-S Chand P Chang W C Chernichenko S Chi C Y Chiba J Chiu M Choi I J Choi J Choudhury R K Chujo T Cianciolo V Cobigo Y Cole B A Constantin P d'Enterria D G David G Delagrange H |
| Affiliation: | Brookhaven National Laboratory, Upton, New York 11973-5000, USA. |
| Abstract: | Event-by-event fluctuations of the average transverse momentum of produced particles near midrapidity have been measured by the PHENIX Collaboration in square root of (sNN)=200 GeV Au+Au, and p+p collisions at the Relativistic Heavy Ion Collider. The fluctuations are observed to be in excess of the expectation for statistically independent particle emission for all centralities. The excess fluctuations exhibit a dependence on both the centrality of the collision and on the pT range over which the average is calculated. Both the centrality and pT dependence can be well reproduced by a simulation of random particle production with the addition of contributions from hard-scattering processes. |
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