Hot spots and gluon field fluctuations as causes of eccentricity in small systems
Demirci, S., Lappi, T., & Schlichting, S. (2021). Hot spots and gluon field fluctuations as causes of eccentricity in small systems. Physical Review D, 103(9), Article 094025. https://doi.org/10.1103/PhysRevD.103.094025
Published inPhysical Review D
© Authors, 2021
We calculate eccentricities in high energy proton-nucleus collisions, by calculating correlation functions of the energy density field of the glasma immediately after the collision event at proper time τ=0+. We separately consider the effects of color charge and geometrical hot spot fluctuations, analytically performing the averages over both in a dilute-dense limit. We show that geometric fluctuations of hot spots inside the proton are the dominant source of eccentricity whereas color charge fluctuations only give a negligible correction. The size and number of hot spots are the most important parameters characterizing the eccentricities.
PublisherAmerican Physical Society (APS)
Publication in research information system
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Related funder(s)Academy of Finland; European Commission
Funding program(s)Academy Project, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingWe gratefully acknowledge support by the Deutsche Forschungsgemeinschaft (DFG) through the Grant No. CRC-TR 211 “Strong-interaction matter under extreme conditions” Project No. 315477589 (S. S.) and the Academy of Finland, Project No. 321840 (T. L). This work is supported by the European Research Council, Grant No. ERC-2015-CoG-681707. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the European Union. ...
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