$Observation of $WZγ$ Production in $pp$ Collisions at $\sqrt{s}$=13 TeV with the ATLAS Detector$

Observation of $WZγ$ Production in $pp$ Collisions at $\sqrt{s}$=13 TeV with the ATLAS Detector

This Letter reports the observation of WZγ production and a measurement of its cross section using 140.1 ± 1.2 fb–1 of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The WZγ production cross section, with both the W and...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Physical review letters 2024-01, Vol.132 (2)
Hauptverfasser:	Ait Tamlihat, M., Åkesson, T. P. A., Anastopoulos, C., Atkinson, M., Azuelos, G., Balz, J., Barklow, T., Bianco, G., Bird, G. A., Brown, L. M., Buzykaev, A. R., Cantero, J., Castillo Gimenez, V., Chow, E. Y. S., Cristoforetti, M., Da Fonseca Pinto, J. V., Darmora, S., De Sanctis, U., Dedovich, D. V., Delitzsch, C. M., Duflot, L., Durglishvili, A., Farbin, A., Ferencz, L., Gorbounov, P. A., Hamer, M., Hanif, H., Heim, S., Jagfeld, C. S., Jäkel, G., Jessiman, C. E., Joshi, R., Kabana, S., Kelly, A. S., Kivernyk, O., Koffas, T., Krumnack, N., Kuprash, O., Kvam, A. K., Lebedev, A., Leight, W. A., Li, X., Little, J. D., Lloyd, S. L., Lorenz, J., Lundberg, O., Lynn, D., Mac Donell, D. M., Martinez Suarez, P., Mashimo, T., Matsuzawa, N., Mc Ginn, C., Mitani, T., Moskalets, T., Munoz Perez, D., Myers, G., Nagy, E., Nakahama, Y., O’Neill, A. P., Ouchrif, M., Paraskevopoulos, C., Pedersen, M., Pernegger, H., Piegaia, R., Poettgen, R., Pontecorvo, L., Primavera, M., Rafanoharana, D., Rassloff, D. F., Ravina, B., Reidelsturz, J. A., Rinnagel, M. P., Ruby, A. J., Safarzadeh Samani, B., Saha, S., Sankey, D. P. C., Schmidt, M. A., Selem, L., Shapiro, M., Simpson, H., Siral, I., Smiesko, J., Smith, A. C., Stamen, R., Steinberg, P., Stonjek, S., Strandberg, J., Trandafir, I. S., Turk Cakir, I., Vadla, K. O. H., Valiente Moreno, E., Watson, M. F., Weber, H. A., Weber, S. M., Wilbern, D. J., Winter, J. K., Wyatt, T. R., Yang, H. T., Yuan, R., Zhao, Z.
Format:	Artikel
Sprache:	eng
Schlagworte:	hadron colliders hadron-hadron interactions photon production PHYSICS OF ELEMENTARY PARTICLES AND FIELDS weak boson production
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	This Letter reports the observation of WZγ production and a measurement of its cross section using 140.1 ± 1.2 fb–1 of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The WZγ production cross section, with both the W and Z bosons decaying leptonically, pp→WZγ→ℓ'± ⁢v⁢ℓ+ℓ–γ (ℓ(')=e, μ), is measured in a fiducial phase-space region defined such that the leptons and the photon have high transverse momentum and the photon is isolated. The cross section is found to be 2.01 ± 0.30⁢(stat) ± 0.16⁢(syst) fb. The corresponding standard model predicted cross section calculated at next-to-leading order in perturbative quantum chromodynamics and at leading order in the electroweak coupling constant is 1.50 ± 0.06 fb. The observed significance of the WZγ signal is 6.3⁢σ, compared with an expected significance of 5.0σ.
ISSN:	0031-9007