Search for a Resonance Decaying to a W Boson and a Photon in Proton-Proton Collisions at √s = 13 TeV Using Leptonic W Boson Decays
Journal of High Energy Physics 2024
Kārlis Dreimanis, Antra Gaile, Conrado Munoz Diaz, Dace Osīte, Guntis Pikurs, Andris Potrebko, Markus Seidel, Dimitrios Sidiropoulos Kontos, CMS Collaboration

A search for a new charged particle X with mass between 0.3 and 2.0 TeV decaying to a W boson and a photon is presented, using proton-proton collision data at a center-of-mass energy of 13 TeV, collected by the CMS experiment and corresponding to an integrated luminosity of 138 fb−1. Particle X has electric charge ±1 and is assumed to have spin 0. The search is performed using the electron and muon decays of the W boson. No significant excess above the predicted background is observed. The upper limit at 95% confidence level on the product of the production cross section of the X and its branching fraction to a W boson and a photon is found to be 94 (137) fb for a 0.3 TeV resonance and 0.75 (0.81) fb for a 2.0 TeV resonance, for an X width-to-mass ratio of 0.01% (5%). This search presents the most stringent constraints to date on the existence of such resonances across the probed mass range. A statistical combination with an earlier study based on the hadronic decay mode of the W boson is also performed, and the upper limit at 95% confidence level for a 2.0 TeV resonance is reduced to 0.50 (0.63) fb for an X width-to-mass ratio of 0.01% (5%).


Keywords
Beyond Standard Model | Hadron-Hadron Scattering | Particle and Resonance Production | Photon Production
DOI
10.1007/JHEP09(2024)186
Hyperlink
https://link.springer.com/article/10.1007/JHEP09(2024)186

The CMS Collaboration, Hayrapetyan, A., Dreimanis, K., Gaile, A., Munoz Diaz, C., Osīte, D., Pikurs, G., Potrebko, A., Seidel, M., Sidiropoulos Kontos, D., ... [et al.] Search for a Resonance Decaying to a W Boson and a Photon in Proton-Proton Collisions at √s = 13 TeV Using Leptonic W Boson Decays. Journal of High Energy Physics, 2024, Vol. 2024, No. 9, Article number 186. ISSN 1029-8479. Pieejams: doi:10.1007/JHEP09(2024)186

Publication language
English (en)
The Scientific Library of the Riga Technical University.
E-mail: uzzinas@rtu.lv; Phone: +371 28399196