Search for Doubly-charged Higgs Boson Production in the Decay H++ H--2![mu]+[mu]+[mu]-[mu]- with 1.1 Fb-1 at D0 Detector
Search for Doubly-charged Higgs Boson Production in the Decay H++ H--2![mu]+[mu]+[mu]-[mu]- with 1.1 Fb-1 at D0 Detector

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Published: 2007

Total Pages: 199

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This work presents a search for the pair production of doubly-charged Higgs bosons in the process p{bar p} 2!H++H-- 2![mu]+[mu]+[mu]-[mu]- using the data corresponding to an integrated luminosity of about 1.1 fb-1. This is the complete dataset of RunIIa taken from April 19, 2002 to February 22, 2006 by the D0 experiment at the Fermilab Tevatron Collider. In the absence of significant excess above standard model background, 95% confidence level mass limits of M(H$±±\atop{L}$)> 150 GeV and M(H$±±\atop{R}$)> 126.5 GeV are set for left-handed and right-handed doubly-charged Higgs bosons respectively assuming a 100% branching ratio into muons.

Search for Doubly-charged Higgs Boson Production in the Decay H++ H--{u2192} ?+?+?-?- with 1.1 Fb-1 at D0 Detector
Search for Doubly-charged Higgs Boson Production in the Decay H++ H--{u2192} ?+?+?-?- with 1.1 Fb-1 at D0 Detector

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Published: 2007

Total Pages: 199

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This work presents a search for the pair production of doubly-charged Higgs bosons in the process p{bar p} → H++H-- → ?+?+?-?- using the data corresponding to an integrated luminosity of about 1.1 fb-1. This is the complete dataset of RunIIa taken from April 19, 2002 to February 22, 2006 by the D0 experiment at the Fermilab Tevatron Collider. In the absence of significant excess above standard model background, 95% confidence level mass limits of M(H$±±top{L}$) > 150 GeV and M(H$±±top{R}$) > 126.5 GeV are set for left-handed and right-handed doubly-charged Higgs bosons respectively assuming a 100% branching ratio into muons.

Search for Doubly-charged Higgs Boson Production in the Decay H++ H-- {u2192} ?+?+?-?- with the D0 Detector at {u221A}s
Search for Doubly-charged Higgs Boson Production in the Decay H++ H-- {u2192} ?+?+?-?- with the D0 Detector at {u221A}s

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Published: 2004

Total Pages: 424

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This work presents a search for the pair production of doubly-charged Higgs Bosons in the process p$ar{p}$ → H++H-- → ?+?+?-?- using inclusive dimuon events. These data correspond to an integrated luminosity of about 113 pb 1 and were recorded by the D0 experiment between August 2002 and June 2003. In the absence of a signal, 95% confidence level mass limits of M(H$±±top{L}$) > 118.6 GeV/c2 and M(HR±±) > 98.1 GeV/c2 are set for left-handed and right-handed doubly-charged Higgs boson, assuming 100% branching into muons and hypercharge.

A Search for Higgs Bosons in Final States with Multiple Tau Leptons at the DØ Experiment
A Search for Higgs Bosons in Final States with Multiple Tau Leptons at the DØ Experiment

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Published: 2012

Total Pages: 260

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Two searches for the production of Higgs bosons decaying into [tau] and [mu] leptons, using data collected with the DØ detector at the Fermilab Tevatron p$\bar{p}$ collider, are presented. A search for the pair production of doubly charged Higgs bosons in the process q$\bar{q}$ 2!H++H--, where H ±± decays to [tau][tau], [mu][mu] or [tau][mu] lepton pairs, with an integrated luminosity of up to L = 7:0 fb-1, is presented. No signi cant excess of data over the expected SM background is observed and the results are used to set 95% C.L. limits on the pair production cross section of doubly charged Higgs bosons in the range 90

Search for NMSSM Higgs Bosons in the H ---] Aa ---] Mu Mu Mu Mu, Mu Mu Tau Tau Channels Using P Anti-p Collisions at S**ư
Search for NMSSM Higgs Bosons in the H ---] Aa ---] Mu Mu Mu Mu, Mu Mu Tau Tau Channels Using P Anti-p Collisions at S**ư

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Published: 2009

Total Pages: 7

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We report on a first search for production of the lightest neutral CP-even Higgs boson (h) in the next-to-minimal supersymmetric standard model, where h decays to a pair of neutral pseudoscalar Higgs bosons (a), using 4.2 fb−1 of data recorded with the D0 detector at Fermilab. The a bosons are required to either both decay to??− or one to?+?− and the other to?+?−. No significant signal is observed, and we set limits on its production as functions of M{sub a} and M{sub h}.

Search for the Standard Model Higgs Boson in ZH 2![mu]+[mu]-b$\bar{b}$ Production at DØ and Evidence for the H2!b$\bar{b}$ Decay at the Tevatron
Search for the Standard Model Higgs Boson in ZH 2![mu]+[mu]-b$\bar{b}$ Production at DØ and Evidence for the H2!b$\bar{b}$ Decay at the Tevatron

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Published: 2014

Total Pages: 176

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Search for ZH → [mu]+[mu]-b$\bar{b}$ is presented, using a Run 2 dataset with an integrated luminosity of 9.7 fb-1 collected by the DØ detector. Selected events contain at least two reconstructed jets and a Z candidate reconstructed with two opposite-sign charged muons. Random forests of decision trees are trained to distinguish between signal and background events in two orthogonal b-tag samples. The ZH → [mu]+[mu]-b$\bar{b}$b analysis is then combined with ZH → e+e-b$\bar{b}$ analysis. For the combined results of ZH → l+l-b$\bar{b}$b, no Higgs signal is observed, limits are set on the ZH cross-section BR(H→ b$\bar{b}$) for different Higgs masses, from 90 to 150 GeV. For a Standard Model (SM) Higgs boson of mass 125 GeV, the observed cross-section limit is 7.1 times the SM cross-section with an expected sensitivity of 5.1 times the SM cross section. The result of ZH → l+l-b$\bar{b}$b channel has been combined with searches in other Higgs decay channels at the Tevatron, which led to the first evidence of H → b$\bar{b}$.

Search for Doubly Charged Higgs Bosons with Lepton-flavour-violating Decays Involving Tau Leptons
Search for Doubly Charged Higgs Bosons with Lepton-flavour-violating Decays Involving Tau Leptons

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Published: 2007

Total Pages: 8

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The authors search for pair production of doubly charged Higgs particles (H{sup ±±}) followed by decays into electron-tau (e[tau]) and muon-tau ([mu][tau]) pairs using a data set corresponding to an integrated luminosity of 350 pb−1 collected from {bar p}p collisions at √s = 1.96 TeV by the CDF II experiment. They search separately for cases where three or four final-state leptons are detected, and then combine the results into limits for each exclusive flavor decay mode of the H{sup ±±}. Assuming 100% branching ratios of the H{sup {+-}{+-}} to left-handed e[tau] ([mu][tau]) pairs, they set an H{sup {+-}{+-}} lower mass limit of 114 (112) GeV/c2 at the 95% confidence level (C.L.).