Production Asymmetry of $D_s$ from 600 GeV/c $\Sigma^-$ and $\pi^-$ beam

M. Kaya; et al (SELEX collaboration)

arXiv:hep-ex/0302039·hep-ex·August 18, 2019

Production Asymmetry of $D_s$ from 600 GeV/c $\Sigma^-$ and $\pi^-$ beam

M. Kaya, et al (SELEX collaboration)

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TL;DR

This study measures the asymmetry in $D_s$ meson production using 600 GeV/c $ m extSigma^-$ and $ m extpi^-$ beams, revealing the influence of beam composition on charm meson production.

Contribution

It provides the first detailed measurement of $D_s$ production asymmetry with $ m extSigma^-$ beams, highlighting the role of leading quark effects in charm production.

Findings

01

Significant asymmetry in $D_s$ production with $ m extSigma^-$ beam

02

Minimal asymmetry observed with $ m extpi^-$ beam

03

Results support leading quark model predictions

Abstract

The production of $D_{s}^{-}$ relative to $D_{s}^{+}$ as a function of $x_{F}$ with 600 GeV/c $Σ^{-}$ beam is measured in the interval $0.15 < x_{F} < 0.7$ by the SELEX (E781) experiment at Fermilab. The integrated charge asymmetries with 600 GeV/c $Σ^{-}$ beam ( $0.53 \pm 0.06$ ) and $π^{-}$ beam ( $0.06 \pm 0.11$ ) are also compared. The results show the $Σ^{-}$ beam fragments play a role in the production of $D_{s}^{-}$ , as suggested by the leading quark model.

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