Enhanced production of charged over neutral kaons in Ar+Sc collisions measured by NA61/SHINE at CERN SPS

Shared by Gary Testing on Nov 3, 2025 • 08:16 AM UTC

Authors:

TomaszMatulewicz1,∗for the NA61/SHINE Collaboration

Abstract

The isospin symmetry, originating from similar masses ofuandd quarks, if exact would result in equal numbers of charged (K+andK−) and neutral (K0andK0) mesons produced in collisions of isospin-symmetric atomic nuclei. The charged and neutralK meson production in Ar+Sc collisions at a center-of-mass ...

Subject

isospin symmetry

kaon production

Ar+Sc collisions

Highlights

-The production of chargedKmesons at mid-rapidity is (18.4±6.1)% higher than that of the neutralKmesons.

-The models of hadron production, including known isospin-symmetry breaking effects, cannot explain the measurements.

Subject

Highlights

Strengths & Weaknesses

Commercial Applications

Societal Benefits & Applications

Comments