Production and polarization of prompt ϒ ( n S ) in the improved color evaporation model using the k T -factorization approach

Cheung, Vincent; Vogt, Ramona

doi:10.1103/PhysRevD.99.034007

Title: Production and polarization of prompt $ϒ (n S)$ in the improved color evaporation model using the $k_{T}$ -factorization approach

Journal Article · Fri Feb 15 00:00:00 EST 2019 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.99.034007· OSTI ID:1494861

Cheung, Vincent; Vogt, Ramona

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.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; SC0004014

OSTI ID:: 1494861

Alternate ID(s):: OSTI ID: 1512591

Report Number(s):: LLNL-JRNL-763159; PRVDAQ; 034007

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Vol. 99 Journal Issue: 3; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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