PhysRevD.88.052010.pdf (1.62 MB)
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Search for ZH -> l(+)l(-)b(b)over-bar production in 9.7 fb(-1) of p(p)over-bar collisions with the D0 detector

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journal contribution
posted on 26.04.2016, 00:00 authored by V. M. Abazov, B. Abbott, B. S. Acharya, M. Adams, T. Adams, G. D. Alexeev, G. Alkhazov, A. Alton, A. Askew, S. Atkins, K. Augsten, C. Avila, F. Badaud, L. Bagby, B. Baldin, D. V. Bandurin, S. Banerjee, E. Barberis, P. Baringer, J. F. Bartlett, U. Bassler, V. Bazterra, A. Bean, M. Begalli, L. Bellantoni
We present a search for the standard model Higgs boson produced in association with a Z boson in 9.7  fb−1 of pp¯ collisions collected with the D0 detector at the Fermilab Tevatron Collider at s√=1.96  TeV. Selected events contain one reconstructed Z→e+e− or Z→μ+μ− candidate and at least two jets, including at least one jet likely to contain a b quark. To validate the search procedure, we also measure the cross section for ZZ production and find that it is consistent with the standard model expectation. We set upper limits at the 95% C.L. on the product of the ZH production cross section and branching ratio B(H→bb¯) for Higgs boson masses 90≤MH≤150  GeV. The observed (expected) limit for MH=125  GeV is a factor of 7.1 (5.1) larger than the standard model prediction.


We thank the staffs at Fermilab and collaborating institutions, and acknowledge support from the DOE and NSF (USA); CEA and CNRS/IN2P3 (France); FASI, Rosatom and RFBR (Russia); CNPq, FAPERJ, FAPESP and FUNDUNESP (Brazil); DAE and DST (India); Colciencias (Colombia); CONACyT (Mexico); KRF and KOSEF (Korea); CONICET and UBACyT (Argentina); FOM (The Netherlands); STFC and the Royal Society (United Kingdom); MSMT and GACR (Czech Republic); CRC Program and NSERC (Canada); BMBF and DFG (Germany); SFI (Ireland); The Swedish Research Council (Sweden); and CAS and CNSF (China).



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