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Title: Production and polarization of prompt $$\Upsilon$$($nS$) in the improved color evaporation model using the $$k_T$$ -factorization approach

Abstract

We calculate the polarization of prompt $$\Upsilon$$($nS$) production in the improved color evaporation model at leading order employing the $$k_T$$-factorization approach. Here, we present the polarization parameter λ$$_{\vartheta}$$ of prompt $$\Upsilon$$($nS$) as a function of transverse momentum in $p$ + $p$ and $p$ + $$\bar{p}$$ collisions to compare with data in the helicity, Collins-Soper and Gottfried-Jackson frames. We also present calculations of the bottomonium production cross sections as a function of transverse momentum and rapidity. This is the first $$p_T$$ -dependent calculation of bottomonium production and polarization in the improved color evaporation model. We find agreement with both bottomonium cross sections and polarization measurements.

Authors:
 [1];  [2]
  1. Univ. of California, Davis, CA (United States). Dept. of Physics
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear and Chemical Sciences Division; Univ. of California, Davis, CA (United States). Dept. of Physics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1494861
Alternate Identifier(s):
OSTI ID: 1512591
Report Number(s):
LLNL-JRNL-763159
Journal ID: ISSN 2470-0010; PRVDAQ; 952225
Grant/Contract Number:  
AC52-07NA27344; SC0004014
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 99; Journal Issue: 3; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Cheung, Vincent, and Vogt, Ramona. Production and polarization of prompt $\Upsilon$($nS$) in the improved color evaporation model using the $k_T$ -factorization approach. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.99.034007.
Cheung, Vincent, & Vogt, Ramona. Production and polarization of prompt $\Upsilon$($nS$) in the improved color evaporation model using the $k_T$ -factorization approach. United States. doi:10.1103/PhysRevD.99.034007.
Cheung, Vincent, and Vogt, Ramona. Fri . "Production and polarization of prompt $\Upsilon$($nS$) in the improved color evaporation model using the $k_T$ -factorization approach". United States. doi:10.1103/PhysRevD.99.034007.
@article{osti_1494861,
title = {Production and polarization of prompt $\Upsilon$($nS$) in the improved color evaporation model using the $k_T$ -factorization approach},
author = {Cheung, Vincent and Vogt, Ramona},
abstractNote = {We calculate the polarization of prompt $\Upsilon$($nS$) production in the improved color evaporation model at leading order employing the $k_T$-factorization approach. Here, we present the polarization parameter λ$_{\vartheta}$ of prompt $\Upsilon$($nS$) as a function of transverse momentum in $p$ + $p$ and $p$ + $\bar{p}$ collisions to compare with data in the helicity, Collins-Soper and Gottfried-Jackson frames. We also present calculations of the bottomonium production cross sections as a function of transverse momentum and rapidity. This is the first $p_T$ -dependent calculation of bottomonium production and polarization in the improved color evaporation model. We find agreement with both bottomonium cross sections and polarization measurements.},
doi = {10.1103/PhysRevD.99.034007},
journal = {Physical Review D},
number = 3,
volume = 99,
place = {United States},
year = {2019},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.99.034007

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