Jet-induced enhancement of deuteron production in pp and p-Pb collisions at the LHC
Jet-associated deuteron production in pp collisions at s=13 TeV and p-Pb collisions at sNN=5.02 TeV is studied in the coalescence model by using the phase-space information of proton and neutron pairs from a multiphase transport (AMPT) model at the kinetic freezeout. In the low transverse momentum (...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269324006609 |
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| author | Yi-Heng Feng Che Ming Ko Yu-Gang Ma Kai-Jia Sun Xin-Nian Wang Zhong Yang Song Zhang |
| author_facet | Yi-Heng Feng Che Ming Ko Yu-Gang Ma Kai-Jia Sun Xin-Nian Wang Zhong Yang Song Zhang |
| author_sort | Yi-Heng Feng |
| collection | DOAJ |
| description | Jet-associated deuteron production in pp collisions at s=13 TeV and p-Pb collisions at sNN=5.02 TeV is studied in the coalescence model by using the phase-space information of proton and neutron pairs from a multiphase transport (AMPT) model at the kinetic freezeout. In the low transverse momentum (pT) region pT/A<1.5 GeV/c, where A is the mass number of a nucleus, the in-jet coalescence factor B2In-jet for deuteron production, given by the ratio of the in-jet deuteron number to the square of the in-jet proton number, is found to be larger than the coalescence factor B2 in the medium perpendicular to the jet by a factor of about 10 in pp collisions and of 25 in p−Pb collisions, which are consistent with the ALICE measurements at the LHC. Such large low-momentum enhancements mainly come from coalescence of nucleons inside the jet with the medium nucleons. Coalescence of nucleons inside the jet dominates deuteron production only at the higher pT region of pT/A≳4 GeV/c, where both the yield ratio d/p of deuteron to proton numbers and the B2 are also significantly larger in the jet direction than in the direction perpendicular to the jet due to the strong collinear correlation among particles produced from jet fragmentation. Studying jet-associated deuteron production in relativistic nuclear collisions thus opens up a new window to probe the phase-space structure of nucleons inside jets. |
| format | Article |
| id | doaj-art-277f66d5c3a640d280679b09b91e71ec |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-277f66d5c3a640d280679b09b91e71ec2024-11-30T07:08:50ZengElsevierPhysics Letters B0370-26932024-12-01859139102Jet-induced enhancement of deuteron production in pp and p-Pb collisions at the LHCYi-Heng Feng0Che Ming Ko1Yu-Gang Ma2Kai-Jia Sun3Xin-Nian Wang4Zhong Yang5Song Zhang6Department of Physics and Center for Field Theory and Particle Physics, Fudan University, Shanghai 200438, China; Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, ChinaCyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAKey Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China; Shanghai Research Center for Theoretical Nuclear Physics, NSFC and Fudan University, Shanghai 200438, ChinaKey Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China; Shanghai Research Center for Theoretical Nuclear Physics, NSFC and Fudan University, Shanghai 200438, China; Corresponding author.Key Laboratory of Quark and Lepton Physics (MOE) & Institute of Particle Physics, Central China Normal University, Wuhan 430079, ChinaKey Laboratory of Quark and Lepton Physics (MOE) & Institute of Particle Physics, Central China Normal University, Wuhan 430079, ChinaKey Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China; Shanghai Research Center for Theoretical Nuclear Physics, NSFC and Fudan University, Shanghai 200438, ChinaJet-associated deuteron production in pp collisions at s=13 TeV and p-Pb collisions at sNN=5.02 TeV is studied in the coalescence model by using the phase-space information of proton and neutron pairs from a multiphase transport (AMPT) model at the kinetic freezeout. In the low transverse momentum (pT) region pT/A<1.5 GeV/c, where A is the mass number of a nucleus, the in-jet coalescence factor B2In-jet for deuteron production, given by the ratio of the in-jet deuteron number to the square of the in-jet proton number, is found to be larger than the coalescence factor B2 in the medium perpendicular to the jet by a factor of about 10 in pp collisions and of 25 in p−Pb collisions, which are consistent with the ALICE measurements at the LHC. Such large low-momentum enhancements mainly come from coalescence of nucleons inside the jet with the medium nucleons. Coalescence of nucleons inside the jet dominates deuteron production only at the higher pT region of pT/A≳4 GeV/c, where both the yield ratio d/p of deuteron to proton numbers and the B2 are also significantly larger in the jet direction than in the direction perpendicular to the jet due to the strong collinear correlation among particles produced from jet fragmentation. Studying jet-associated deuteron production in relativistic nuclear collisions thus opens up a new window to probe the phase-space structure of nucleons inside jets.http://www.sciencedirect.com/science/article/pii/S0370269324006609 |
| spellingShingle | Yi-Heng Feng Che Ming Ko Yu-Gang Ma Kai-Jia Sun Xin-Nian Wang Zhong Yang Song Zhang Jet-induced enhancement of deuteron production in pp and p-Pb collisions at the LHC Physics Letters B |
| title | Jet-induced enhancement of deuteron production in pp and p-Pb collisions at the LHC |
| title_full | Jet-induced enhancement of deuteron production in pp and p-Pb collisions at the LHC |
| title_fullStr | Jet-induced enhancement of deuteron production in pp and p-Pb collisions at the LHC |
| title_full_unstemmed | Jet-induced enhancement of deuteron production in pp and p-Pb collisions at the LHC |
| title_short | Jet-induced enhancement of deuteron production in pp and p-Pb collisions at the LHC |
| title_sort | jet induced enhancement of deuteron production in pp and p pb collisions at the lhc |
| url | http://www.sciencedirect.com/science/article/pii/S0370269324006609 |
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