Journal
PHYSICAL REVIEW C
Volume 92, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.92.055207
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Funding
- NSFC [11221504, 11405066]
- China MOST [2014DFG02050]
- Major State Basic Research Development Program in China [2014CB845404]
- U.S. DOE [DE-AC02-05CH11231]
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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. Through 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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