CLAS Physics Database

EG2 run CLAS data

Spokesperson
W. Brooks et al
Year
2011
Abstract
The influence of cold nuclear matter on lepto-production of hadrons in semi-inclusive deep inelastic scattering is measured using the CLAS detector in Hall B at Jefferson Lab and a 5.014 GeV electron beam. We report the $K_s^0$ multiplicity ratios for targets of C, Fe, and Pb relative to deuterium as a function of the fractional virtual photon energy $z$ transferred to the $K_s^0$ and the transverse momentum squared $p_{T}^2$ of the $K_s^0$. We find that the multiplicity ratios for $K^0_s$ are reduced in the nuclear medium at high $z$ and low $p_{T}^2$, with a trend for the $K^0_s$ transverse momentum to be broadened in the nucleus for large $p_{T}^2$.
Publication
  1. A. Daniel, K. Hicks, W. Brooks, H. Hakobyan, and CLAS Collaboration Measurement of the nuclear multiplicity ratio for K0s hadronization at CLAS // PLB 706 (2011) 26-31
Quantities
Rm(12C/2H) Rm(56Fe/2H) Rm(208Pb/2H)

Measurements

ID Quantity Beam Target Final state Q2min,
GeV2
Q2max,
GeV2
Wmin,
GeV
Wmax,
GeV
E134M1 Rm(12C/2H) e 12C semi-inclusive 1.0 4.25 1.414 3.0
E134M2 Rm(56Fe/2H) e 56Fe semi-inclusive 1.0 4.25 1.414 3.0
E134M3 Rm(208Pb/2H) e 208Pb semi-inclusive 1.0 4.25 1.414 3.0
E134M4 Rm(12C/2H) e 12C semi-inclusive 1.0 4.25 1.414 3.0
E134M5 Rm(56Fe/2H) e 56Fe semi-inclusive 1.0 4.25 1.414 3.0
E134M6 Rm(208Pb/2H) e 208Pb semi-inclusive 1.0 4.25 1.414 3.0