Measurement of transverse single-spin asymmetries for dijet production in polarized proton-proton collisions at √s = 200 GeV
- We report a new measurement of transverse single-spin asymmetries for dijet production in collisions of polarized protons at s√ = 200 GeV. Possible correlations between the proton spin and the transverse momenta of its partons, mutually orthogonal, with each perpendicular to the proton momentum direction, are probed at high Q2 ≈160 GeV2. The associated Sivers observable ⟨kT⟩, the average parton transverse momentum, is extracted using simple kinematics. Nonzero Sivers effects are observed for the first time in proton-proton collisions, but only when the jets are sorted by their net charge, which enhances the u- or d-quark contributions to separate data samples. This also enables a determination of the individual partonic contributions to the observed asymmetries.
URN: | urn:nbn:de:hebis:30:3-861686 |
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URL: | https://arxiv.org/abs/2305.10359v1 |
DOI: | https://doi.org/10.48550/ARXIV.2305.10359 |
ArXiv Id: | http://arxiv.org/abs/2305.10359v1 |
Parent Title (English): | arXiv |
Publisher: | arXiv |
Document Type: | Preprint |
Language: | English |
Date of Publication (online): | 2023/05/17 |
Date of first Publication: | 2023/05/17 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Creating Corporation: | STAR Collaboration |
Release Date: | 2024/07/17 |
Issue: | 2305.10359v1 |
Edition: | Version 1 |
Page Number: | 8 |
Institutes: | Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS) |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International |