Energy Independence of the Collins Asymmetry in p↑p Collisions

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F25%3A00645513" target="_blank" >RIV/61389005:_____/25:00645513 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prl/abstract/10.1103/jgsw-zhny" target="_blank" >https://journals.aps.org/prl/abstract/10.1103/jgsw-zhny</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/jgsw-zhny" target="_blank" >10.1103/jgsw-zhny</a>

Result language
angličtina
Original language name
Energy Independence of the Collins Asymmetry in p↑p Collisions
Original language description
The STAR experiment reports new, high-precision measurements of the transverse single-spin asymmetries for pi(+/-) within jets, namely the Collins asymmetries, from transversely polarized p(up arrow)p collisions at root s = 510 GeV. The energy-scaled distribution of jet transverse momentum, x(T) = 2p(T,jet)/root s, shows a remarkable consistency for Collins asymmetries of pi(+/-) in jets between root 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(up arrow)p collisions. These results extend to high-momentum scales (Q(2) <= 3400 GeV2) and enable unique tests of evolution and universality in the transverse-momentum-dependent formalism, thus providing important constraints for the Collins fragmentation functions.
Czech name
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Czech description
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Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
10303 - Particles and field physics

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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