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A measurement of the mass of the Higgs boson combining the $H\to ZZ^{*} \to 4\ell$ and $H\to\gamma\gamma$ decay channels is presented. The result is based on 140 fb$^{-1}$ of proton-proton collision data collected by the ATLAS detector…

高能物理 - 实验 · 物理学 2024-01-23 The ATLAS Collaboration

A search for a heavy Standard Model Higgs boson decaying via H->ZZ->llqq, where l=e,mu, is presented. The search is performed using a data set of pp collisions at sqrt(s)=7 TeV, corresponding to an integrated luminosity of 1.04 fb^-1…

高能物理 - 实验 · 物理学 2012-08-27 The ATLAS Collaboration

In many models with extended Higgs sectors, $e.g.$ 2HDM, NMSSM, there exists a light scalar $h$, lighter than the Standard Model (SM) like Higgs, and the coupling of $hZZ$ can be very small, as expected from the likeness of the 125 GeV…

高能物理 - 实验 · 物理学 2018-01-26 Yan Wang , Jenny List , Mikael Berggren

We study the phenomenology of the light and heavy Higgs boson production and decay in the context of a $U(1)_{B-L}$ extension of the Standard Model with an additional $Z'$ boson at future $e^+e^-$ linear colliders with center-of-mass…

高能物理 - 唯象学 · 物理学 2016-08-24 F. Ramirez-Sanchez , A. Gutierrez-Rodriguez , M. A. Hernandez-Ruiz

A search for a heavy Standard Model Higgs boson decaying via H->ZZ->llqq, where l=e or mu, is presented. The search uses a data set of pp collisions at sqrt(s) = 7 TeV, corresponding to an integrated luminosity of 4.7 fb^-1 collected in…

高能物理 - 实验 · 物理学 2013-06-11 ATLAS Collaboration

We reconsider Higgs boson invisible decays into Dark Matter in the light of recent Higgs searches at the LHC. Present hints in the CMS and ATLAS data favor a non-standard Higgs boson with approximately 50% invisible branching ratio, and…

高能物理 - 唯象学 · 物理学 2015-05-30 Martti Raidal , Alessandro Strumia

A search for Higgs boson decays into a $Z$ boson and a light resonance in two-lepton plus jet events is performed, using a $pp$ collision dataset with an integrated luminosity of 139 fb$^{-1}$ collected at $\sqrt{s}=13$ TeV by the ATLAS…

高能物理 - 实验 · 物理学 2021-01-15 ATLAS Collaboration

Precise determinations of the masses of the $W$ boson and of the top quark could stringently test the radiative structure of the Standard Model (SM) or provide evidence for new physics. We analyze the excellent prospects at a muon collider…

高能物理 - 唯象学 · 物理学 2009-10-30 M. S. Berger

We have examined how a Standard Model or Supersymmetric Higgs boson h might be detected at possible hadron colliders. The channels W(to ell nu)h(to b b~), Z(to ell ell~)h(to b b~) and W/Z(to jets)h(to tau+ tau-) are most useful. The results…

高能物理 - 唯象学 · 物理学 2016-09-01 Stephen Mrenna , G. L. Kane

Measurements of the production of the standard model Higgs boson decaying to a W boson pair are reported. The W$^+$W$^-$ candidates are selected in events with an oppositely charged lepton pair, large missing transverse momentum, and…

高能物理 - 实验 · 物理学 2019-03-05 CMS Collaboration

We demonstrate that an invisibly decaying Higgs boson with Standard Model coupling strength to top--anti-top can be detected at the LHC for masses up to about 250 GeV.

高能物理 - 唯象学 · 物理学 2009-10-22 J. F. Gunion

Higgs decay branching ratios at future Higgs factories can be measured by directly exploiting class numeration. Given the clean environment at a lepton collider, it is possible to build an event sample highly enriched in Higgs bosons and…

高能物理 - 实验 · 物理学 2021-05-13 Jonas Kunath , Fabricio Jimenez Morales , Jean-Claude Brient , Vincent Boudry

A study is presented of the mass and spin-parity of the new boson recently observed at the LHC at a mass near 125 GeV. An integrated luminosity of 17.3 inverse femtobarns, collected by the CMS experiment in proton-proton collisions at…

高能物理 - 实验 · 物理学 2013-03-07 CMS Collaboration

A search is described to detect charged Higgs bosons via the process e^+e^- -> H^+H^-, using data collected by the OPAL detector at center-of-mass energies of 130-172 GeV with a total integrated luminosity of 25 pb^-1. The decay channels…

高能物理 - 实验 · 物理学 2008-11-26 The OPAL Collaboration , K. Ackerstaff et al

The measurement of the Higgs coupling to W bosons is an important program at the international linear collider (ILC) to search for the anomaly in the coupling to the gauge bosons. We study the sensitivity of ILC to the Higgs anomalous…

高能物理 - 唯象学 · 物理学 2010-06-18 Yosuke Takubo , Katsumasa Ikematsu , Nobuchika Okada , Robert N. Hodgkinson , Keisuke Fujii

In many extensions of the standard model, there exist a few extra Higgs bosons. Suppose a heavy neutral Higgs boson H is discovered at the LHC, one could then investigate CP and CPT~ properties of its couplings to a pair of $Z$ bosons…

高能物理 - 唯象学 · 物理学 2018-01-17 Jung Chang , Kingman Cheung , Jae Sik Lee , Chih-Ting Lu , Jubin Park

We investigate a possibility of precision measurements for parameters of the Littlest Higgs model with T-parity at the International Linear Collider (ILC). The model predicts new gauge bosons which masses strongly depend on the vacuum…

高能物理 - 唯象学 · 物理学 2009-07-02 Eri Asakawa , Masaki Asano , Keisuke Fujii , Tomonori Kusano , Shigeki Matsumoto , Rei Sasaki , Yosuke Takubo , Hitoshi Yamamoto

An accurate determination of the Higgsstrahlung cross section is one of the main objectives at a future electron-positron collider. It allows for the only Higgs boson decay model independent measurement of the total Higgs width. Current…

高能物理 - 实验 · 物理学 2020-02-20 Jonas Kunath , Jean-Claude Brient

We evaluate the LHC's potential of observing Higgs boson decays into light elementary or composite resonances through their hadronic decay channels. We focus on the Higgs boson production processes with the largest cross sections, $pp\to h$…

高能物理 - 唯象学 · 物理学 2016-09-28 Andrew S. Chisholm , Silvan Kuttimalai , Konstantinos Nikolopoulos , Michael Spannowsky

A search for a Higgs boson decay $H\to\gamma^*\gamma\to\ell\ell\gamma$ is presented. The analysis is performed using proton-proton collision data recorded by the CMS detector at the CERN LHC at a centre-of-mass energy of 8 TeV,…

高能物理 - 实验 · 物理学 2016-01-06 Andrey Pozdnyakov