Azimuthal transverse single-spin asymmetries of inclusive jets and identified hadrons within jets from polarized 𝑝⁢𝑝 collisions at √𝑠 =200  GeV

Authors

STAR Collaboration

Abstract

The STAR Collaboration reports measurements of the transverse single-spin asymmetries, 𝐴𝑁, for inclusive jets and identified “hadrons within jets” production at midrapidity from transversely polarized 𝑝⁢𝑝 collisions at √𝑠 =200  GeV, based on data recorded in 2012 and 2015. The inclusive jet asymmetry measurements include 𝐴𝑁 for inclusive jets and 𝐴𝑁 for jets containing a charged pion carrying a momentum fraction 𝑧 >0.3 of the jet momentum. The identified hadron within jet asymmetry measurements include the Collins effect for charged pions, kaons, and protons, and the Collins-like effect for charged pions. The measured asymmetries are determined for several distinct kinematic regions characterized by the jet transverse momentum 𝑝𝑇 and pseudorapidity 𝜂, as well as the hadron momentum fraction 𝑧 and momentum transverse to the jet axis 𝑗𝑇. These results probe higher momentum scales (𝑄2 up to ∼900  GeV2) than current, semi-inclusive deep-inelastic scattering measurements, and they provide new constraints on quark transversity in the proton and enable tests of evolution, universality, and factorization breaking in the transverse-momentum-dependent formalism.

Document Type

Article

Publication Date

2022

Notes/Citation Information

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 SCOAP 3 .

Digital Object Identifier (DOI)

https://doi.org/10.1103/PhysRevD.106.072010

Funding Information

The authors thank Umberto D’Alesio, Francesco Murgia, Cristian Pisano, Zhong-Bo Kang, Alexei Prokudin, Felix Ringer, and Feng Yuan for valuable discussions and providing the results of their model calculations. We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science, the U.S. National Science Foundation, National Natural Science Foundation of China, Chinese Academy of Science, the Ministry of Science and Technology of China and the Chinese Ministry of Education, the Higher Education Sprout Project by Ministry of Education at NCKU, the National Research Foundation of Korea, Czech Science Foundation and Ministry of Education, Youth and Sports of the Czech Republic, Hungarian National Research, Development and Innovation Office, New National Excellency Programme of the Hungarian Ministry of Human Capacities, Department of Atomic Energy and Department of Science and Technology of the Government of India, the National Science Centre and WUT ID-UB of Poland, the Ministry of Science, Education and Sports of the Republic of Croatia, German Bundesministerium für Bildung, Wissenschaft, Forschung and Technologie (BMBF), Helmholtz Association, Ministry of Education, Culture, Sports, Science, and Technology (MEXT), and Japan Society for the Promotion of Science (JSPS).

Repository Citation

STAR Collaboration, "Azimuthal transverse single-spin asymmetries of inclusive jets and identified hadrons within jets from polarized 𝑝⁢𝑝 collisions at √𝑠 =200  GeV" (2022). Physics and Astronomy Faculty Publications. 750.
https://uknowledge.uky.edu/physastron_facpub/750