@article{f0c3bf864ff24b3b9595e5322b4ef27e,
title = "Evidence for Nonlinear Gluon Effects in QCD and Their Mass Number Dependence at STAR",
abstract = "The STAR Collaboration reports measurements of back-to-back azimuthal correlations of di-π0s produced at forward pseudorapidities (2.6<η<4.0) in p+p, p+Al, and p+Au collisions at a center-of-mass energy of 200 GeV. We observe a clear suppression of the correlated yields of back-to-back π0 pairs in p+Al and p+Au collisions compared to the p+p data. The observed suppression of back-to-back pairs as a function of transverse momentum suggests nonlinear gluon dynamics arising at high parton densities. The larger suppression found in p+Au relative to p+Al collisions exhibits a dependence of the saturation scale Qs2 on the mass number A. A linear scaling of the suppression with A1/3 is observed with a slope of -0.09±0.01.",
author = "\{(STAR Collaboration)\} and Abdallah, \{M. S.\} and Aboona, \{B. E.\} and J. Adam and L. Adamczyk and Adams, \{J. R.\} and Adkins, \{J. K.\} and G. Agakishiev and I. Aggarwal and Aggarwal, \{M. M.\} and Z. Ahammed and I. Alekseev and Anderson, \{D. M.\} and A. Aparin and Aschenauer, \{E. C.\} and Ashraf, \{M. U.\} and Atetalla, \{F. G.\} and A. Attri and Averichev, \{G. S.\} and V. Bairathi and W. Baker and \{Ball Cap\}, \{J. G.\} and K. Barish and A. Behera and R. Bellwied and P. Bhagat and A. Bhasin and J. Bielcik and J. Bielcikova and Bordyuzhin, \{I. G.\} and Brandenburg, \{J. D.\} and Brandin, \{A. V.\} and I. Bunzarov and Cai, \{X. Z.\} and H. Caines and \{Calder{\'o}n De La Barca S{\'a}nchez\}, M. and D. Cebra and I. Chakaberia and P. Chaloupka and Chan, \{B. K.\} and Chang, \{F. H.\} and Z. Chang and N. Chankova-Bunzarova and A. Chatterjee and S. Chattopadhyay and D. Chen and J. Chen and Chen, \{J. H.\} and X. Chen and Z. Chen and S. Heppelmann",
note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society.",
year = "2022",
month = aug,
day = "26",
doi = "10.1103/PhysRevLett.129.092501",
language = "English (US)",
volume = "129",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "9",
}