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A search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->l+l-l+l-, where l=e,mu, is presented. Proton-proton collision data at sqrt(s)=7 TeV recorded with the ATLAS detector and corresponding to an average integrated…

High Energy Physics - Experiment · Physics 2012-08-27 ATLAS Collaboration

Interpretations of Higgs searches critically involve production cross sections and decay probabilities for different analysis channels. Mixing effects can reduce production rates, while invisible decays can reduce decay probabilities. Both…

High Energy Physics - Phenomenology · Physics 2015-06-03 Christoph Englert , Tilman Plehn , Michael Rauch , Dirk Zerwas , Peter M. Zerwas

A search for the standard model Higgs boson (H) decaying to a b-quark pair when produced in association with weak vector bosons (V) is reported for the following modes: W(mu,nu)H, W(e,nu)H, Z(mu,mu)H, Z(e,e)H and Z(nu,nu)H. The search is…

High Energy Physics - Experiment · Physics 2014-11-14 CMS Collaboration

The Higgs boson with a mass $M_H \approx 126$ GeV has been observed by the ATLAS and CMS experiments at the LHC and a total significance of about five standard deviations has been reported by both collaborations when the channels $H\to…

High Energy Physics - Phenomenology · Physics 2012-09-04 J. Baglio , A. Djouadi , R. M. Godbole

Recent results on Higgs searches at the LHC point towards the existence of a Higgs boson with mass of about 126 GeV whose diphoton decay rate tends to be larger than in the Standard Model. These results are in tension with natural MSSM…

High Energy Physics - Phenomenology · Physics 2013-05-30 Antonio Delgado , Germano Nardini , Mariano Quiros

In supersymmetry, the Higgs quartic couplings is given by the sum in quadrature of the weak gauge couplings. This leads to the prediction of a light Higgs boson, which still holds when considering loop corrections from soft supersymmetry…

High Energy Physics - Phenomenology · Physics 2009-11-19 Nir Polonsky , Shufang Su

The latest results of Higgs boson searches beyond the Standard Model from the ATLAS and CMS experiments are reviewed. This includes searches for additional neutral, charged, and double charged Higgs-like bosons, searches for dark matter…

High Energy Physics - Experiment · Physics 2024-09-24 André Sopczak

Since the discovery of the Higgs boson in 2012, significant progress has been made in measuring several properties related to the Higgs boson. The large dataset available now facilitates precise measurements of the Higgs boson mass, natural…

High Energy Physics - Experiment · Physics 2024-05-17 Spandan Mondal

We consider the implications of the CDF collaboration high-precision measurement of the W boson mass on models with a non-standard Higgs. We show that this requires an enhancement of 3-10% in the non-standard Higgs coupling to the gauge…

High Energy Physics - Phenomenology · Physics 2022-06-15 Giacomo Cacciapaglia , Francesco Sannino

We combine results from CDF and DO searches for a standard model Higgs boson in ppbar collisions at the Fermilab Tevatron, at sqrt{s}=1.96 TeV. With 3.0 fb-1 of data analyzed at CDF, and at DO, the 95% C.L. upper limits on Higgs boson…

High Energy Physics - Experiment · Physics 2008-08-06 Tevatron New Phenomena , Higgs working group , CDF Collaboration , D0 Collaboration

This review is based on the talk presented at the SUSY 2012 (Beijing). The new particle around 125 GeV observed at the Large Hadron Collider (LHC) is almost consistent with the standard model Higgs boson, except that the diphoton decay mode…

High Energy Physics - Phenomenology · Physics 2012-12-24 Jung Chang , Kingman Cheung , Po-Yan Tseng , Tzu-Chiang Yuan

We review the constraints on Higgs boson properties from effective potential methods. In the Standard Model, the requirement of stability (or metastability) of the standard electroweak minimum puts an upper bound on the scale of new physics…

High Energy Physics - Phenomenology · Physics 2016-11-03 M. Quiros

We study the possibility to separate in gluon fusion loop-induced Higgs boson production from point-like production. The Higgs boson is reconstructed in the Hgg final state at very large transverse momentum. Using the Higgs boson yields…

High Energy Physics - Phenomenology · Physics 2015-07-27 Urs Langenegger , Michael Spira , Ivo Strebel

Preliminary results of the search for a Standard Model like Higgs boson at the LHC with 5 fb-1 data have just been presented by the ATLAS and CMS collaborations and an excess of events at a mass of ~125 GeV has been reported. If this excess…

High Energy Physics - Phenomenology · Physics 2012-01-26 A. Arbey , M. Battaglia , A. Djouadi , F. Mahmoudi , J. Quevillon

This report reviews the properties of Higgs bosons in the Standard Model (SM) and its various extensions. We give an extensive overview about the potential of the ILC operated at centre-of-mass energies up to 1 TeV (including the gamma…

It is proposed to replace the Higgs boson of the standard model by a Lorentz- and gauge-invariant combination of SU(2) gauge bosons. A pair of Higgs bosons is identified with pairs of gauge bosons by setting their mass Lagrangians equal to…

High Energy Physics - Phenomenology · Physics 2015-11-18 F. J. Himpsel

We demonstrate a measurement of the Higgs boson mass by the method of energy scanning at photon-photon colliders, using the high energy edge of the photon spectrum. With an integrated luminosity of 50 $\rm{fb^{-1}}$ it is possible to…

High Energy Physics - Phenomenology · Physics 2015-06-25 T. Ohgaki

A search is presented for a high-mass Higgs boson in the $H\rightarrow\ell\ell\ell\ell$, $H\rightarrow\ell\ell\nu\nu$, $H\rightarrow\ell\ell qq$, and $H\rightarrow\nu\nu qq$ decay modes using the ATLAS detector at the CERN Large Hadron…

High Energy Physics - Experiment · Physics 2016-03-08 ATLAS Collaboration

We explore new physics scenarios which are optimally probed through precision Higgs measurements rather than direct collider searches. Such theories consist of additional electroweak charged or singlet states which couple directly to or mix…

High Energy Physics - Phenomenology · Physics 2015-06-12 Clifford Cheung , Samuel D. McDermott , Kathryn M. Zurek

At one loop in the conventional on-mass-shell renormalization scheme, the production and decay rates of the Higgs boson H exhibit singularities proportional to (2 M_V - M)^{-1/2} as the Higgs-boson mass M approaches from below the…

High Energy Physics - Phenomenology · Physics 2009-10-31 Bernd A. Kniehl , Caesar P. Palisoc , Alberto Sirlin