Please visit Jefferson Lab Event Policies and Guidance before planning your next event: https://www.jlab.org/conference_planning.

Sep 5 – 9, 2022
online
US/Eastern timezone
Thank you to all the participants for a great QNP2022!

Role of a triangular singularity in the γ p→p π0 η reaction

Sep 5, 2022, 3:25 PM
25m
online

online

FSU, Tallahassee, FL, USA

Speaker

Volker Metag (II. Physikalisches Institut, University of Giessen)

Description

Recently structures in invariant mass distributions and excitation energy spectra have been attributed to triangular singularities as discussed in e.g., [1, 2] and in the review by Guo et al.[3]. These singularities emerge under specific kinematic conditions when new reaction channels open up. It will be shown that a triangular singularity associated with the opening of the γp → pa0 → pπ0η channel can explain the observation of a structure in the Mpη invariant mass distribution near 1700 MeV/c2 in the γp → pπ0η reaction [4]

References
[1] G. D. Alexeev et al., The COMPASS Collaboration, Phys. Rev. Lett 127, 082501 (2021).
[2] M. Mikhasenko, B. Ketzer and A. Sarantsev, Phys. Rev. D 91, 094015 (2015).
[3] F. K. Guo et al., Rev. Mod. Phys. D 90, 015004 (2018).
[4] V. Metag et al.,EPJA 57, 325 (2021).
∗Supported by DFG through SFB/TR16.

speaker affiliation II. Physikalisches Institut, University of Giessen

Primary author

Volker Metag (II. Physikalisches Institut, University of Giessen)

Co-author

Mariana Nanova (II. Physikalisches Institut, University of Giessen)

Presentation materials