Searches for heavy Higgs bosons in two-Higgs-doublet models and for t to ch decay using multilepton and diphoton final states in pp collisions at 8 TeV

Abstract

Searches are presented for heavy scalar (H) and pseudoscalar (A) Higgs bosons posited in the two doublet model (2HDM) extensions of the standard model (SM). These searches are based on a data sample of pp collisions collected with the CMS experiment at the LHC at a center-of-mass energy of sqrt(s) = 8 TeV and corresponding to an integrated luminosity of 19.5 inverse femtobarns. The decays H to hh and A to Zh, where h denotes an SM-like Higgs boson, lead to events with three or more isolated charged leptons or with a photon pair accompanied by one or more isolated leptons. The search results are presented in terms of the H and A production cross sections times branching fractions and are further interpreted in terms of 2HDM parameters. We place 95% CL cross section upper limits of approximately 7 pb on sigma times B for H to hh and 2 pb for A to Zh. Also presented are the results of a search for the rare decay of the top quark that results in a charm quark and an SM Higgs boson, t to ch, the existence of which would indicate a nonzero flavor-changing Yukawa coupling of the top quark to the Higgs boson. We place a 95% CL upper limit of 0.56% on B(t to ch).

arXiv commentReplaced with published version. Added journal reference and DOI

References in corpus (26)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The anti-k_t jet clustering algorithm
• Theory and phenomenology of two-Higgs-doublet models
• Confidence Level Computation for Combining Searches with Small Statistics
• Pileup subtraction using jet areas
• MadEvent: Automatic Event Generation with MadGraph
• Observation of a new boson with mass near 125 GeV in pp collisions at sqrt(s) = 7 and 8 TeV
• Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV
• Identification of b-quark jets with the CMS experiment
• Measurement of the properties of a Higgs boson in the four-lepton final state
• 2HDMC - Two-Higgs-Doublet Model Calculator
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• SusHi: A program for the calculation of Higgs production in gluon fusion and bottom-quark annihilation in the Standard Model and the MSSM
• Measurement of the Inclusive W and Z Production Cross Sections in pp Collisions at sqrt(s) = 7 TeV
• Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at sqrt(s) = 7 TeV
• CTEQ6 Parton Distributions with Heavy Quark Mass Effects
• Performance of tau-lepton reconstruction and identification in CMS
• Searching for Signs of the Second Higgs Doublet
• Measurement of the t t-bar production cross section in the dilepton channel in pp collisions at sqrt(s) = 7 TeV
• Search for anomalous production of events with three or more leptons in pp collisions at sqrt(s) = 8 TeV
• When the Higgs meets the Top: Search for t --> ch^0 at the LHC
• Exclusive Signals of an Extended Higgs Sector
• Search for top quark decays $t\to qH$ with $H\to \gamma \gamma$ using the ATLAS detector
• Searching for $t\to ch$ with Multi-Leptons
• Multi-Lepton Signals of Multiple Higgs Bosons

Cited by in corpus (49)

• Search for diphoton resonances in the mass range from 150 to 850 GeV in pp collisions at sqrt(s) = 8 TeV
• Fingerprinting the extended Higgs sector using one-loop corrected Higgs boson couplings and future precision measurements
• Flavour Changing Higgs Couplings in a Class of Two Higgs Doublet Models
• Search for Higgs boson pair production in the $b\bar{b}b\bar{b}$ final state from $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• New LHC Benchmarks for the CP-conserving Two-Higgs-Doublet Model
• Search for a pseudoscalar boson decaying into a Z boson and the 125 GeV Higgs boson in llbb final states
• Search for heavy Higgs bosons $A/H$ decaying to a top quark pair in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for two Higgs bosons in final states containing two photons and two bottom quarks in proton-proton collisions at 8 TeV
• Searches for a heavy scalar boson H decaying to a pair of 125 GeV Higgs bosons hh or for a heavy pseudoscalar boson A decaying to Zh, in the final states with h to tau tau
• Search for Higgs boson pair production in the $\gamma \gamma W{W}^{\ast }$ channel using $pp$ collision data recorded at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for a massive resonance decaying to a pair of Higgs bosons in the four b quark final state in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Symmetries for SM Alignment in multi-Higgs Doublet Models
• Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks
• A search for Higgs boson pair production in the bb tau tau final state in proton-proton collisions at sqrt(s) = 8 TeV
• Simultaneous Search for Extra Light and Heavy Higgs Bosons via Cascade Decays
• Search for flavour-changing neutral current top-quark decays to $qZ$ in $pp$ collision data collected with the ATLAS detector at $\sqrt{s}=8$ TeV
• Search for top quark decays via Higgs-boson-mediated flavor-changing neutral currents in pp collisions at sqrt(s) = 8 TeV
• Search for production of Higgs boson pairs in the four b quark final state using large-area jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for flavour-changing neutral current top quark decays $t\to Hq$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Neutral Higgs production at proton colliders in the CP-conserving NMSSM
• New Signatures of Flavor Violating Higgs Couplings
• Probing Anomalous FCNC Top-Higgs Yukawa Couplings at the Large Hadron Electron Collider
• Heavy Higgs Bosons at Low $\tan \beta$: from the LHC to 100 TeV
• Flavor Physics and CP Violation
• Quark-flavored scalar dark matter
• Controlled Flavour Changing Neutral Couplings in Two Higgs Doublet Models
• Status and prospects of the nMSSM after LHC Run-1
• Top-quark physics at the Large Hadron Collider
• Searches for the Anomalous FCNC Top-Higgs Couplings with Polarized Electron Beam at the LHeC
• Natural Alignment in the Two Higgs Doublet Model
• The compatibility of LHC Run 1 data with a heavy scalar of mass around 270\,GeV
• Natural Standard Model Alignment in the Two Higgs Doublet Model
• Symmetry Constrained Two Higgs Doublet Models
• Search strategies for pair production of heavy Higgs bosons decaying invisibly at the LHC
• Charming Top Decays with Flavor Changing Neutral Higgs Boson and WW at Hadron Colliders
• Neutrino-axion-dilaton interconnection
• Search for Flavor Changing Neutral Currents in $t\to Hc,H\to \tau \tau$ Decay at the LHC
• The MSSM without Gluinos; an Effective Field Theory for the Stop Sector
• The Hunt for the Rest of the Higgs Bosons
• Flavor changing top decays to charm and Higgs with $\tau \tau$ at the LHC
• Dark Matter in Leptophilic Higgs Models After the LHC Run-I
• Decadal Mission for the New Physics Higgs/Flavor Era
• Search for a Low-Mass Neutral Higgs Boson with Suppressed Couplings to Fermions Using Events with Multiphoton Final States
• Flavor from the Electroweak Scale
• The Electron/Muon Specific Two Higgs Doublet Model at e+ e- Colliders
• Higgs boson discovery and recent results
• A mass reconstruction technique for a heavy resonance decaying to ${\tau }^{+}{\tau }^{-}$
• Exploring LHC Run 1 and 2 data using the Madala hypothesis
• Phenomenology of additional scalar bosons at the LHC