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Hadron Transverse Momentum Distributions in Muon Deep Inelastic Scattering at 160 GeV/$c$

The COMPASS collaboration Adolph, C. ; Alekseev, M.G. ; Alexakhin, V.Yu. ; et al.

Eur.Phys.J.C 73 (2013) 2531, 2013.

Inspire Record 1236358 DOI 10.17182/hepdata.61432

Multiplicities of charged hadrons produced in deep inelastic muon scattering off a $^6$LiD 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.

48 data tables

Table 1

PT dependences of the differential multiplicities for 0.0045 < x_Bjorken < 0.0060 and 1.00 < Q^2 < 1.25 GeV^2 for Positive hadrons.

Table 2

PT dependences of the differential multiplicities for 0.0060 < x_Bjorken < 0.0080 and 1.00 < Q^2 < 1.30 GeV^2 for Positive hadrons.

Table 3

PT dependences of the differential multiplicities for 0.0060 < x_Bjorken < 0.0080 and 1.30 < Q^2 < 1.70 GeV^2 for Positive hadrons.

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Inclusive $\K^0$(s), $\Lambda$ and Anti-lambda Production in $\pi^+ D$ Interactions at 24-{GeV}/c

Dado, S. ; Goldberg, J. ; Toaff, S. ; et al.

Phys.Rev.D 22 (1980) 2656, 1980.

Inspire Record 8878 DOI 10.17182/hepdata.4164

We have studied inclusive KS0, Λ, and Λ¯ production in π+d interactions at 24 GeV/c. The observed cross sections are 2.5±0.13 mb for KS0, 1.62±0.09 mb for Λ, and 0.12±0.02 mb for Λ¯. Longitudinal- and transverse-momentum distributions of the produced particles are presented. The average charged multiplicities of the system associated with a KS0 or with a Λ are presented and discussed. A nonzero average Λ polarization (-0.10±0.03) is observed. The x distribution of the backward (forward) KS0 and Λ produced in the reaction are in agreement with the x distribution of valence quarks in nucleons in nuclear target (pion beam), as predicted by the quark-recombination model of particle production applied to nuclear targets.

14 data tables

Table 1

Axis error includes +- 0.0/0.0 contribution (?////THE QUOTED IN THE TABLES ERROR INCLUDE ESTIMATES OF UNCERTAINTY IN EACH OF THE CORRECTIONS MADE IN ADDITION TO THE STATISTICAL ERRORCORRECTIONS HAVE BEEN MADE FOR DETECTION, MEASURING, AND FITTING LOSSES AS WELL AS FOR NEUTRAL DECAY MODES OF THE STRANGE PARTICLESNO CORRECTION WAS MADE FOR CONTAMINATION FROM KL'S NOR FOR UNAVOIDABLE INCLUSION OF SIGMA0 EVENTS).

Table 2

Table 3