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

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-ev...

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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 BV Elsevier
Subjects:	ATLAS; BSM Higgs boson ATLAS; BSM Higgs boson; Nuclear and High Energy Physics BSM Higgs boson Nuclear and High Energy Physics Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS QC1-999 Settore FIS/01 - FISICA SPERIMENTALE ATLAS BSM Higgs boson
ISSN:	0370-2693, 1873-2445
Online Access:	Get full text
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Summary:	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.
Bibliography:	AC02-06CH11357; SC0012704; AC02-76CH03000; AC02-05CH11231; AC03-76SF00515 USDOE Office of Science (SC), High Energy Physics (HEP)
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2015.03.054