Abstract
In the framework of the dense-dilute color glass condensate approach, we study fluctuations in the multiplicity of produced particles in collisions. We show that the leading effect that drives the fluctuations is the Bose enhancement of gluons in the proton wave function. We explicitly calculate the moment generating function that resums the effects of Bose enhancement. We show that it can be understood in terms of the Liouville effective action for the composite field, which is identified with the fluctuating density, or saturation momentum of the proton. The resulting probability distribution turns out to be very close to the distribution. We also calculate the first correction to this distribution, which is due to pairwise Hanbury Brown–Twiss correlations of produced gluons.
- Received 5 June 2018
DOI:https://doi.org/10.1103/PhysRevD.98.014004
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society