Search for a CP-odd Higgs boson decaying to Zh in pp collisions at s=8 TeV with the ATLAS detector

• Published in: Physics letters. B Vol. 744; no. C; pp. 163 - 183
• Main Authors: Abbott, B., Abdallah, J., Adye, T., Anjos, N., Argyropoulos, S., Baranov, S.P., Barreiro, F., Bell, W.H., Bertsche, C., Bianchini, L., Bingul, A., Bock, C., Bogdanchikov, A.G., Boldyrev, A.S., Brennan, A.J., Bristow, T.M., Bruni, A., Budagov, I.A., Buttinger, W., Carli, T., Cerri, A., Chen, Y., Ciapetti, G., Ciubancan, M., Conde Muiño, P., Cristinziani, M., Daniells, A.C., Debenedetti, C., Duckeck, G., Elsing, M., Ferrando, J., Friedrich, F., Gadomski, S., Galea, C., Gardner, R.W., Giulini, M., Gladilin, L.K., Gorelov, I., Gornicki, E., Grassi, V., Hamano, K., Hamer, M., Iwanski, W., Jiang, Y., Kalderon, C.W., Kepka, O., Keyes, R.A., Klein, U., Koi, T., Konoplich, R., Kotwal, A., Kourkoumeli-Charalampidi, A., Kurochkin, Y.A., Lavrijsen, W., Leisos, A., Limbach, C., Love, P.A., Maleev, V.P., Maneira, J., Mansoulie, B., Mantifel, R., Martin, B., Mastrandrea, P., Masubuchi, T., McPherson, R.A., Menke, S., Middleton, R.P., Nagasaka, Y., Negrini, M., Nelson, A., Pan, Y.B., Phillips, P.W., Poppleton, A., Qian, J., Redelbach, A., Rijssenbeek, M., Rubbo, F., Rudolph, C., Rybar, M., Sakamoto, H., Sanchez, A., Santonico, R., Sedov, G., Sinervo, P., Starovoitov, P., Stroynowski, R., Tanaka, S., Tavares Delgado, A., Teixeira Dias Castanheira, M., Temming, K.K., Tsybychev, D., Usanova, A., Vogel, M., Voss, R., Wang, S.M., Weingarten, J., Wenaus, T., Werner, P., Wharton, A.M., Woudstra, M.J.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 11.05.2015; Elsevier
• Subjects: BSM Higgs boson; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ATLAS; BSM Higgs boson
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2015.03.054

A search for a heavy, CP-odd Higgs boson, A, decaying into a Z boson and a 125 GeV Higgs boson, h, with the ATLAS detector at the LHC is presented. The search uses proton–proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb−1. Decays of CP-even h bosons to ττ or bb pairs with the Z boson decaying to electron or muon pairs are considered, as well as h→bb decays with the Z boson decaying to neutrinos. No evidence for the production of an A boson in these channels is found and the 95% confidence level upper limits derived for σ(gg→A)×BR(A→Zh)×BR(h→ff¯) are 0.098–0.013 pb for f=τ and 0.57–0.014 pb for f=b in a range of mA=220–1000 GeV. The results are combined and interpreted in the context of two-Higgs-doublet models.