Measurement of the Wγ Production Cross Section in Proton-Proton Collisions at √s=13 TeV and Constraints on Effective Field Theory Coefficients

A fiducial cross section for W gamma production in proton-proton collisions is measured at a center-of-mass energy of 13 TeV in 137 fb(-1) of data collected using the CMS detector at the LHC. The W -> e nu and mu nu decay modes are used in a maximum-likelihood fit to the lepton-photon invariant m...

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Veröffentlicht in:	Physical review letters 2021-06, Vol.126 (25), p.1, Article 252002
Hauptverfasser:	Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Chatterjee, S., Dragicevic, M., Del Valle, A. Escalante, Fruhwirth, R., Jeitler, M., Krammer, N., Lechner, L., Liko, D., Mikulec, Pitters, F. M., Schieck, J., Schofbeck, R., Spanring, M., Templ, S., Waltenberger, W., Wulz, C-E, Chekhovsky, Litomin, A., Makarenko, Darwish, M. R., De Wolf, E. A., Janssen, X., Kello, T., Lelek, A., Sfar, H. Rejeb, Van Mechelen, P., Van Putte, S., Van Remortel, N., Blekman, F., Bols, E. S., D'Hondt, J., De Clercq, J., Delcourt, M., Lowette, S., Moortgat, S., Morton, A., Muller, D., Sahasransu, A. R., Tavernier, S., Van Doninck, W., Van Mulders, P., Beghin, D., Bilin, B., Clerbaux, B., De Lentdecker, G., Favart, L., Grebenyuk, A., Kalsi, A. K., Lee, K., Moureaux, L., Petre, L., Popov, A., Postiau, N., Starling, E., Thomas, L., Vander Velde, C., Vanlaer, P., Vannerom, D., Wezenbeek, L., Cornelis, T., Dobur, D., Gruchala, M., Mestdach, G., Niedziela, M., Roskas, C., Skovpen, K., Tytgat, M., Verbeke, W., Vermassen, B., Vit, M., Bethani, A., Bruno, G., Bury, F., Caputo, C., David, P., Delaere, C., Donertas, I. S., Giammanco, A., Lemaitre, Mondal, K., Prisciandaro, J., Taliercio, A., Teklishyn, M., Vischia, P., Wertz, S., Wuyckens, S., Alves, G. A., Hensel, C., Moraes, A., Alda Junior, W. L., Ferreira Filho, M. Barroso, Malbouisson, H. Brandao, Carvalho, W., Chinellato, J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Confidence intervals Couplings Cross-sections Field theory Large Hadron Collider Leptons Mass distribution Particle collisions Physical Sciences Physics Physics, Multidisciplinary Protons Quantum chromodynamics Science & Technology Solenoids
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Beschreibung
Zusammenfassung:	A fiducial cross section for W gamma production in proton-proton collisions is measured at a center-of-mass energy of 13 TeV in 137 fb(-1) of data collected using the CMS detector at the LHC. The W -> e nu and mu nu decay modes are used in a maximum-likelihood fit to the lepton-photon invariant mass distribution to extract the combined cross section. The measured cross section is compared with theoretical expectations at next-to-leading order in quantum chromodynamics. In addition, 95% confidence level intervals are reported for anomalous triple-gauge couplings within the framework of effective field theory.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.126.252002