Energy Independence of the Collins Asymmetry in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mi>p</mml:mi> </mml:mrow> <mml:mrow> <mml:mo stretchy="false">↑</mml:mo> </mml:mrow> </mm

The STAR experiment reports new, high-precision measurements of the transverse single-spin asymmetries for π^{±} within jets, namely the Collins asymmetries, from transversely polarized p^{↑}p collisions at sqrt[s]=510 GeV. The energy-scaled distribution of jet transverse momentum, x_{T}=2p_{T,jet}/sqrt[s], shows a remarkable consistency for Collins asymmetries of π^{±} in jets between sqrt[s]=200 GeV and 510 GeV. This indicates that the Collins asymmetries are nearly energy independent, with, at most, a very weak scale dependence in p^{↑}p collisions. These results extend to high-momentum scales (Q^{2}≤3400 GeV^{2}) and enable unique tests of evolution and universality in the transverse-momentum-dependent formalism, thus providing important constraints for the Collins fragmentation functions.

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Publication Details

Journal
Physical Review Letters
Published
2025-11-12
DOI
https://doi.org/10.1103/jgsw-zhny
Citations
1
Primary Topic
High-Energy Particle Collisions Research
Type
article
Field-Weighted Citation Impact
1.87
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article

Energy Independence of the Collins Asymmetry in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mi>p</mml:mi> </mml:mrow> <mml:mrow> <mml:mo stretchy="false">↑</mml:mo> </mml:mrow> </mm

Karl J. Friston
1 citations
Physical Review Letters
High-Energy Particle Collisions Research
1.87
article

Energy Independence of the Collins Asymmetry in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mi>p</mml:mi> </mml:mrow> <mml:mrow> <mml:mo stretchy="false">↑</mml:mo> </mml:mrow> </mm

Karl J. Friston
article en
1 citations

Abstract

The STAR experiment reports new, high-precision measurements of the transverse single-spin asymmetries for π^{±} within jets, namely the Collins asymmetries, from transversely polarized p^{↑}p collisions at sqrt[s]=510 GeV. The energy-scaled distribution of jet transverse momentum, x_{T}=2p_{T,jet}/sqrt[s], shows a remarkable consistency for Collins asymmetries of π^{±} in jets between sqrt[s]=200 GeV and 510 GeV. This indicates that the Collins asymmetries are nearly energy independent, with, at most, a very weak scale dependence in p^{↑}p collisions. These results extend to high-momentum scales (Q^{2}≤3400 GeV^{2}) and enable unique tests of evolution and universality in the transverse-momentum-dependent formalism, thus providing important constraints for the Collins fragmentation functions.

Physical Review LettersVol. 135(26)
Eötvös Loránd University (HU), Warsaw University of Technology (PL), Lovely Professional University (IN), Creighton University (US), University of Science and Technology of China (CN), Jagiellonian University (PL), Indian Institute of Science Education and Research Kolkata (IN), Variable Energy Cyclotron Centre (IN), Argonne National Laboratory (US), State University of New York (US), University of Kentucky (US), University of Jammu (IN), University of Tsukuba (JP), Lawrence Berkeley National Laboratory (US), Valparaiso University (US), Kent State University (US), Shandong University (CN), National Institute of Technology Durgapur (IN), Chongqing University (CN), National Institute of Science Education and Research (IN), Indian Institute of Science Education and Research Mohali (IN), Wayne State University (US), University of Tarapacá (CL), Lehigh University (US), South China Normal University (CN), United States Naval Academy (US), Ball State University (US), Chinese Academy of Sciences (CN), Brookhaven National Laboratory (US), Purdue University West Lafayette (US), Heidelberg University (DE), Fudan University (CN), Temple College (US), Mitchell Institute (US), Frankfurt Institute for Advanced Studies (DE), University of California System (US), Sejong University (KR), Indian Institute of Science Education and Research, Bhopal (IN), Guangxi Normal University (CN), Huzhou Normal University (CN), Technische Universität Darmstadt (DE), Yale University (US), Southern Connecticut State University (US), University of Illinois Chicago (US), Central China Normal University (CN), Max Planck Institute for Physics (DE), Rutgers Sexual and Reproductive Health and Rights (NL), Indian Institute of Science Education and Research Berhampur (IN), Indian Institute of Science Education and Research, Tirupati (IN), Czech Academy of Sciences, Nuclear Physics Institute (CZ), University of Chinese Academy of Sciences (CN), Wuhan University of Science and Technology (CN), University of Houston (US), Czech Technical University in Prague (CZ), University of Calabria (IT), Texas Southern University (US), Panjab University (IN), The Ohio State University (US), Indiana University (US), Abilene Christian University (US), AGH University of Krakow (PL), Rice University (US), Lanzhou University (CN), American University in Cairo (EG), Temple University (US), Academia Sinica (TW), Heidelberg University (US), Michigan State University (US), Texas A&M University (US), National Cheng Kung University (TW), Tsinghua University (CN)
Openalex Percentile: Top 10%
High-Energy Particle Collisions Research
1.87
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