Determination of the Relative Sign of the Higgs Boson Couplings to W and Z Bosons Using W H Production via Vector-Boson Fusion with the ATLAS Detector

• Published in: Physical review letters Vol. 133; no. 14
• Main Authors: Alberghi, G. L., Allbrooke, B. M. M., Antel, C., Barklow, T., Battulga, D., Beermann, T. A., Begel, M., Bhatta, S., Bobbink, G. J., Boehler, M., Burdin, S., Burgard, C. D., Burr, J. T. P., Calafiura, P., Carlson, E. M., Cheng, C. L., Cieri, D., Cristoforetti, M., Cueto, A., De Sanctis, U., Dittus, F., Draguet, M. A., Epari, S., Farazpay, Z., Feng, C., Filthaut, F., Frid, Y. Y., Glisic, M., Gocke, B., Gomes, A., González Andana, R. Y., Haas, A., Harkusha, S., Hays, J. M., Heinrich, J. J., Hopkins, W. H., Hoya, J., Hyneman, R., Jakobs, K., Jakoubek, T., Kagan, H., Kawamoto, T., Kepka, O., Kersten, S., Ketabchi Haghighat, S., Khoo, T. J., Kingston, M. K., Klein, L., Klioutchnikova, T., Kreul, K., Li, B., Li, H., Lister, A., Lyubushkin, V., Maccarrone, G., Mapekula, X., Martin-Haugh, S., Maurer, J., Mckenzie, R. P., Mehlhase, S., Miller, L. S., Mino, Y., De Carvalho, A. L. Moreira, Morii, M., Murin, M., Nayaz, A., Neuhaus, F., Paraskevopoulos, C., Pastore, F., Penski, K. E., Pietreanu, D., Pereira, B. C. Pinheiro, Rimoldi, M., Robles Gajardo, C. M., Rocchi, A., Rossini, L., Rotaru, M., Safai Tehrani, F., Sammel, D., Sánchez, J., Schamberger, R. D., Shatalov, P. B., Sherwood, P., Spousta, M., Sugizaki, K., Sultansoy, S., Tarna, G., Thaler, A., Tovey, D. R., Tricoli, A., Tsiamis, A., Vormwald, B., Wang, A. Z., Wang, H., Wenaus, T., Wilkens, H. G., Wynne, B. M., Yeletskikh, I., Yorita, K., Zeng, J. C.
• Format: Journal Article
• Language: English
• Published: United States American Physical Society 02-10-2024
• ISSN: 0031-9007

The associated production of Higgs and
W
bosons via vector-boson fusion is highly sensitive to the relative sign of the Higgs boson couplings to
W
and
Z
bosons. In this Letter, two searches for this process are presented, using
140

fb
−
1
of proton-proton collision data at
s
=
13

TeV
recorded by the ATLAS detector at the LHC. The first search targets scenarios with opposite-sign couplings of the
W
and
Z
bosons to the Higgs boson, while the second targets standard model-like scenarios with same-sign couplings. Both analyses consider Higgs boson decays into a pair of
b
quarks and
W
boson decays with an electron or muon. The data exclude the opposite-sign coupling hypothesis with a significance beyond
5
σ
, and the observed (expected) upper limit set on the cross section for vector-boson fusion
W
H
production is 9.0 (8.7) times the standard model value at 95% confidence level.
<supplementary-material>
<copyright-statement>© 2024 CERN, for the ATLAS Collaboration</copyright-statement>
2024
CERN
</supplementary-material>