A possible evidence of pion condensation

TL;DR

This paper suggests that pion condensation in high-energy hadron collisions can produce a gamma-ray spectrum with a broken power-law shape, potentially explaining similar astronomical observations, caused by soft gluon condensation in protons.

Contribution

It introduces the idea that pion condensation leads to a characteristic gamma-ray spectrum, linking high-energy physics phenomena with astrophysical observations.

Findings

Gamma-ray spectrum from pion decay shows a broken power-law shape.

Pion condensation is caused by soft gluon condensation in protons.

Potential explanation for observed gamma-ray spectra in astronomy.

Abstract

This work demonstrates that once a large number of pion is condensed in a high-energy hadron collision, the gamma-ray spectrum from $\pi^0$ decay takes on a typical broken power-law shape, which has been documented in many astronomical observations, but we have not yet recognized it. We show that this pion condensation is caused by a large number of soft gluons condensed in protons.