Hadron transverse momentum distributions in muon deep inelastic scattering at 160 GeV/c

Abstract

Multiplicities of charged hadrons produced in deep inelastic muon scattering off a ⁶LiD target have been measured as a function of the DIS variables x _Bj , Q ², W ² and the final state hadron variables p _T and z. The $p_{T}^{2}$ distributions are fitted with a single exponential function at low values of $p_{T}^{2}$ to determine the dependence of $\langle p_{T}^{2} \rangle$ on x _Bj , Q ², W ² and z. The z-dependence of $\langle p_{T}^{2} \rangle$ is shown to be a potential tool to extract the average intrinsic transverse momentum squared of partons, $\langle k_{\perp}^{2} \rangle$, as a function of x _Bj and Q ² in a leading order QCD parton model.

Appendix

Table 1 Definition of the 23 bins of x _Bj and Q ² and corresponding mean values; Q ² is in units of (GeV/c)²

Table 2 Fitted $\langle p_{T}^{2} \rangle$ in units of (GeV/c)² for the 23 (x _Bj , Q ²) bins (rows) and the 8 z intervals (columns) for positive hadrons. The error of the least significant digit(s) is given in parentheses. Same information as Fig. 13

Table 3 Fitted $\langle p_{T}^{2} \rangle$ in units of (GeV/c)² for the 23 (x _Bj , Q ²) bins (rows) and the 8 z intervals (columns) for negative hadrons. The error of the least significant digit(s) is given in parentheses. Same information as Fig. 14