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[[Sphenix-l] ] Fw: New STAR paper ready for submission: "Measurements of Upsilon States Production in p+ p Collisions at √s= 500 GeV with STAR: Cross Sections, Ratios, and Multiplicity Dependence "
- From: "Huang, Jin" <jhuang AT bnl.gov>
- To: "Sphenix-l AT lists.bnl.gov" <sphenix-l AT lists.bnl.gov>
- Subject: [[Sphenix-l] ] Fw: New STAR paper ready for submission: "Measurements of Upsilon States Production in p+ p Collisions at √s= 500 GeV with STAR: Cross Sections, Ratios, and Multiplicity Dependence "
- Date: Sat, 25 Jan 2025 20:52:56 +0000
Please find following paper submission announcement from STAR.
From: Frank Geurts <geurts AT rice.edu>
Sent: Saturday, January 25, 2025 2:05 PM
To: Huang, Jin <jhuang AT bnl.gov>; Connors, Megan <mconnors AT bnl.gov>; Akiba, Yasuyuki <akiba AT bnl.gov>; Deshpande, Abhay <abhay AT bnl.gov>
Cc: Ruan, Lijuan <ruan AT bnl.gov>
Subject: New STAR paper ready for submission: "Measurements of Upsilon States Production in p+ p Collisions at √s= 500 GeV with STAR: Cross Sections, Ratios, and Multiplicity Dependence "
Sent: Saturday, January 25, 2025 2:05 PM
To: Huang, Jin <jhuang AT bnl.gov>; Connors, Megan <mconnors AT bnl.gov>; Akiba, Yasuyuki <akiba AT bnl.gov>; Deshpande, Abhay <abhay AT bnl.gov>
Cc: Ruan, Lijuan <ruan AT bnl.gov>
Subject: New STAR paper ready for submission: "Measurements of Upsilon States Production in p+ p Collisions at √s= 500 GeV with STAR: Cross Sections, Ratios, and Multiplicity Dependence "
Dear Abhay, Jin, Megan, and Akiba-san,
We are pleased to announce that STAR plans to submit the following paper for publication in one week.
Target journal: Phys.Rev. D
Title: "Measurements of Upsilon States Production in p+ p Collisions at √s= 500 GeV with STAR: Cross Sections, Ratios, and Multiplicity Dependence"
Abstract:
We report measurements of Υ(1S), Υ(2S) and Υ(3S) production in p+pcollisions at √s= 500GeV by the STAR experiment in year 2011, corresponding to an integrated luminosity Lint = 13 pb^{−1}. The results provide precise cross sections, transverse momentum (pT) and rapidity (y) spectra, as well as cross section ratios for pT < 10 GeV/c and |y|< 1. The dependence of the Υ yield on charged particle multiplicity has also been measured, offering new insights into the mechanisms of quarkonium production. The data are compared to various theoretical models: the Color Evaporation Model (CEM) accurately describes the Υ(1S) production, while the Color Glass Condensate + Non-relativistic Quantum Chromodynamics (CGC+NRQCD) model overestimates the data, particularly at low pT. Conversely, the Color Singlet Model (CSM) underestimates the rapidity dependence. These discrepancies highlight the need for further development in understanding the production dynamics of heavy quarkonia in high-energy hadronic collisions. The trend in the multiplicity dependence is consistent with CGC/Saturation and String Percolation models or Υ production happening in multiple parton interactions modeled by PYTHIA8.
Best regards,
Frank & Lijuan
________________________________________________________________________
Frank Geurts (he/him)
Professor of Physics & Astronomy • Rice University, Houston TX
T.W. Bonner Nucl. Lab. • Dept. of Physics & Astronomy
office 713-348-5314 • web http://heavyions.rice.edu
________________________________________________________________________
We are pleased to announce that STAR plans to submit the following paper for publication in one week.
Target journal: Phys.Rev. D
Title: "Measurements of Upsilon States Production in p+ p Collisions at √s= 500 GeV with STAR: Cross Sections, Ratios, and Multiplicity Dependence"
Abstract:
We report measurements of Υ(1S), Υ(2S) and Υ(3S) production in p+pcollisions at √s= 500GeV by the STAR experiment in year 2011, corresponding to an integrated luminosity Lint = 13 pb^{−1}. The results provide precise cross sections, transverse momentum (pT) and rapidity (y) spectra, as well as cross section ratios for pT < 10 GeV/c and |y|< 1. The dependence of the Υ yield on charged particle multiplicity has also been measured, offering new insights into the mechanisms of quarkonium production. The data are compared to various theoretical models: the Color Evaporation Model (CEM) accurately describes the Υ(1S) production, while the Color Glass Condensate + Non-relativistic Quantum Chromodynamics (CGC+NRQCD) model overestimates the data, particularly at low pT. Conversely, the Color Singlet Model (CSM) underestimates the rapidity dependence. These discrepancies highlight the need for further development in understanding the production dynamics of heavy quarkonia in high-energy hadronic collisions. The trend in the multiplicity dependence is consistent with CGC/Saturation and String Percolation models or Υ production happening in multiple parton interactions modeled by PYTHIA8.
Best regards,
Frank & Lijuan
________________________________________________________________________
Frank Geurts (he/him)
Professor of Physics & Astronomy • Rice University, Houston TX
T.W. Bonner Nucl. Lab. • Dept. of Physics & Astronomy
office 713-348-5314 • web http://heavyions.rice.edu
________________________________________________________________________
- [[Sphenix-l] ] Fw: New STAR paper ready for submission: "Measurements of Upsilon States Production in p+ p Collisions at √s= 500 GeV with STAR: Cross Sections, Ratios, and Multiplicity Dependence ", Huang, Jin, 01/25/2025
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