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Title: Resonance suppression from color reconnection

Abstract

We present studies that show how multi-parton interaction and color reconnection affect the hadrochemistry in proton-proton (pp) collisions with special focus on the production of resonances using the PYTHIA8 event generator. We find that color reconnection suppresses the relative production of meson resonances such as ρ 0 and K*, providing an alternative explanation for the K*/K decrease observed in proton-proton collisions as a function of multiplicity by the ALICE collaboration. Detailed studies of the underlying mechanism causing meson resonance suppression indicate that color reconnection leads to shorter, less energetic strings whose fragmentation is less likely to produce more massive hadrons for a given quark content, therefore reducing ratios such as K*/K and ρ 0/π in high-multiplicity pp collisions. In addition, we have also studied the effects of allowing string junctions to form and found that these may also contribute to resonance suppression.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2]
  1. Univ. Estadual de Campinas, Campinas, São Paulo (Brazil)
  2. Univ. of Texas, Austin, TX (United States)
Publication Date:
Research Org.:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
OSTI Identifier:
1420196
Alternate Identifier(s):
OSTI ID: 1503878
Grant/Contract Number:  
SC0013391; 16/13803-2; 14/09167-8; 17/05685-2
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 97; Journal Issue: 3; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Acconcia, R., Chinellato, D. D., de Souza, R. Derradi, Takahashi, J., Torrieri, G., and Markert, C. Resonance suppression from color reconnection. United States: N. p., 2018. Web. doi:10.1103/physrevd.97.036010.
Acconcia, R., Chinellato, D. D., de Souza, R. Derradi, Takahashi, J., Torrieri, G., & Markert, C. Resonance suppression from color reconnection. United States. doi:10.1103/physrevd.97.036010.
Acconcia, R., Chinellato, D. D., de Souza, R. Derradi, Takahashi, J., Torrieri, G., and Markert, C. Mon . "Resonance suppression from color reconnection". United States. doi:10.1103/physrevd.97.036010.
@article{osti_1420196,
title = {Resonance suppression from color reconnection},
author = {Acconcia, R. and Chinellato, D. D. and de Souza, R. Derradi and Takahashi, J. and Torrieri, G. and Markert, C.},
abstractNote = {We present studies that show how multi-parton interaction and color reconnection affect the hadrochemistry in proton-proton (pp) collisions with special focus on the production of resonances using the PYTHIA8 event generator. We find that color reconnection suppresses the relative production of meson resonances such as ρ0 and K*, providing an alternative explanation for the K*/K decrease observed in proton-proton collisions as a function of multiplicity by the ALICE collaboration. Detailed studies of the underlying mechanism causing meson resonance suppression indicate that color reconnection leads to shorter, less energetic strings whose fragmentation is less likely to produce more massive hadrons for a given quark content, therefore reducing ratios such as K*/K and ρ0/π in high-multiplicity pp collisions. In addition, we have also studied the effects of allowing string junctions to form and found that these may also contribute to resonance suppression.},
doi = {10.1103/physrevd.97.036010},
journal = {Physical Review D},
issn = {2470-0010},
number = 3,
volume = 97,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/physrevd.97.036010

Citation Metrics:
Cited by: 1 work
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