Multidimensional study of hadronization in nuclei

作者：Airapetian A^*; Akopov N; Akopov Z; Aschenauer E C; Augustyniak W; Avakian R; Avetissian A; Avetisyan E; Belostotski S; Bianchi N; Blok H P; Borissov A; Bowles J; Brodski I; Bryzgalov V; Burns J; Capiluppi M; Capitani G P; Ci**ani E; Ciullo G; Contalbrigo M; Dalpiaz P F; Deconinck W; De Leo R; De Nardo L; De Sanctis E; Diefenthaler M; Di Nezza P; Dueren M; Ehrenfried M; Elbakian G; Ellinghaus F; Fabbri R; Fantoni A

来源：European Physical Journal A, 2011, 47(9): 113.

DOI：10.1140/epja/i2011-11113-5

Hadron multiplicities in semi-inclusive deep-inelastic scattering were measured on neon, krypton, and xenon targets relative to deuterium at an electron(positron)-beam energy of 27.6 GeV at HERMES. These ratios were determined as a function of the virtual-photon energy v, its virtuality Q(2), the fractional hadron energy z and the transverse hadron momentum with respect to the virtual-photon direction p(t). Dependences were analysed separately for positively and negatively charged pions and kaons as well as protons and antiprotons in a two-dimensional representation. Compared to the one-dimensional dependences, some new features were observed. In particular, when z > 0.4 positive kaons do not show the strong monotonic rise of the multiplicity ratio with v as exhibited by pions and negative kaons. Protons were found to behave very differently from the other hadrons.

• 出版日期2011-9
• 单位北京大学