2017/01/31 by Gaurav Tomar
Physics and Astronomy · #Atomic physics #Auger #Black Holes and Theoretical Physics #Dispersion relation #Hadron #Lorentz covariance #Lorentz transformation #Muon #Noncommutative and Quantum Gravity Theories #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Pion #Quantum mechanics #hep-ph
paper · pdf · doi:10.1103/physrevd.95.095035
10 pages, 2 figures. v2: version accepted for publication in PRD
arxiv created 2017/05/16 · openalex publication_date 2017/05/31 · arxiv updated 2017/06/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The Auger Collaboration has observed the number of muons, which is higher than its prediction by existing hadronic interaction models. We explain this excess of muons by using Lorentz invariance violation (LIV) in the photon sector. As an outcome of Lorentz invariance violation, the dispersion relation of the photon gets modified, which we use for the calculation of \ensuremathπ0 decay width. In the Auger data of primary energy 109.8<E(GeV)<1010.2, we find that the neutral pion decay width is suppressed in comparison to its standard model (SM) counterpart. As a result, we get a large number of muons explaining the observed muon excess. We consider Planck-suppressed LIV at order O(p2/MPl2) for studying the photon sector, which is in agreement with the current bounds and not as tightly constrained as LIV at order O(p/MPl).