Medium-induced flavor conversion and kaon spectra in electron-ion collisions

Chang, Ning-Bo; Deng, Wei-Tian; Wang, Xin-Nian

doi:10.1103/PhysRevC.92.055207

Title: Medium-induced flavor conversion and kaon spectra in electron-ion collisions

Journal Article · Mon Nov 23 00:00:00 EST 2015 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.92.055207· OSTI ID:1429348

Chang, Ning-Bo ^[1]; Deng, Wei-Tian ^[2]; Wang, Xin-Nian ^[3]

China Central Normal Univ., Wuhan (China). Key Lab. of Quark and Lepton Physics (MOE) and Inst. of Particle Physics
Huazhong Univ. of Science and Technology, Wuhan (China). School of Physics
China Central Normal Univ., Wuhan (China). Key Lab. of Quark and Lepton Physics (MOE) and Inst. of Particle Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division

Multiple scattering and induced parton splitting lead to a medium modification of the QCD evolution for jet fragmentation functions and final hadron spectra. Medium-induced parton splittings not only lead to energy loss of leading partons and suppression of leading hadron spectra, but also modify the flavor composition of a jet due to induced flavor conversion via gluon emission and quark pair production and annihilation. By doing a numerical study of the medium-modified QCD evolution, leading K^- strange meson spectra are found to be particularly sensitive to the medium-induced flavor conversion in semi-inclusive deeply inelastic scatterings (SIDIS) off a large nucleus. The induced flavor conversion can lead to an increased number of gluons and sea quarks in a jet shower and, as a consequence, enhance the leading K^- spectrum to counter the effect of parton energy loss in SIDIS with large momentum fractions x_B, where the struck quarks are mostly valence quarks of the nucleus.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Basic Research Program of China; Ministry of Science and Technology (MOST) (China); National Natural Science Foundation of China (NSFC); JET Collaboration

Grant/Contract Number:: AC02-05CH11231; 11221504; 11405066; 2014DFG02050; 2014CB845404

OSTI ID:: 1429348

Alternate ID(s):: OSTI ID: 1226866

Journal Information:: Physical Review C, Nuclear Physics, Vol. 92, Issue 5; Related Information: ©2015 American Physical Society.; ISSN 0556-2813

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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