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Results on elastic cross sections in proton-proton collisions at √s = 510 GeV with the STAR detector at RHIC

We report results on an elastic cross section measurement in proton-proton collisions at a center-of-mass energy √s=510 GeV, obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section is measured in the four-momentum...

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Main Authors: Abdulhamid, Muhammad Ibrahim (Author) , Deppner, Ingo Martin (Author) , Herrmann, Norbert (Author) , Leung, Yue (Author) , Söhngen, Yannick (Author)
Corporate Author: STAR Collaboration (Author)
Format: Article (Journal) Editorial
Language:English
Published: May 2024
In: Physics letters
Year: 2024, Volume: 852, Pages: 1-10
ISSN:1873-2445
DOI:10.1016/j.physletb.2024.138601
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.physletb.2024.138601
Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S037026932400159X
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Author Notes:The STAR Collaboration
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Summary:We report results on an elastic cross section measurement in proton-proton collisions at a center-of-mass energy √s=510 GeV, obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section is measured in the four-momentum transfer squared range 0.23≤−t≤0.67 GeV2. This is the only measurement of the proton-proton elastic cross section in this t range for collision energies above the Intersecting Storage Rings (ISR) and below the Large Hadron Collider (LHC) colliders. We find that a constant slope B does not fit the data in the aforementioned t range, and we obtain a much better fit using a second-order polynomial for B(t). This is the first measurement below the LHC energies for which the non-constant behavior B(t) is observed. The t dependence of B is also determined using six subintervals of t in the STAR measured t range, and is in good agreement with the phenomenological models. The measured elastic differential cross section dσ/dt agrees well with the results obtained at s=540 GeV for proton-antiproton collisions by the UA4 experiment. We also determine that the integrated elastic cross section within the STAR t-range is σelfid=462.1±0.9(stat.)±1.1(syst.)±11.6(scale) μb.
Item Description:The STAR Collaboration: M.I. Abdulhamid, I.M. Deppner, N. Herrmann, Y.H. Leung, Y. Söhngen [und viele weitere]
Online verfügbar 5 April 2024, Version des Artikels 12 April 2024
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Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2024.138601

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