Higgs singlet extension in the light of the lhc discovery

Higgs singlet extension in the light of the lhc discovery

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In this paper, we present a detailed Monte Carlo simulation study of the triple-Higgs production through gluon fusion at a TeV hadron collider and explore the feasibility of observing this production mode.

Our study shows that, in order to observe the Standard Model triple-Higgs signal, the integrated luminosity of a TeV hadron collider should be greater than 1. We also examine how new physics can change the production rate of triple-Higgs events. For example, in the singlet extension of the Standard Model, we find that the triple-Higgs production rate can be increased by a factor of O Works referenced in this record:.

GOV collections:. United States: N. Copy to clipboard. United States. Free Publicly Available Full Text. Accepted Manuscript Publisher. Accepted Manuscript DOE.

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Copyright Statement. Other availability. Search WorldCat to find libraries that may hold this journal. Cited by: 13 works. Citation information provided by Web of Science. LinkedIn Pinterest Tumblr.

Physics Letters B, Vol. Nuclear Physics B, Vol. Physical Review D, Vol. Journal of High Energy Physics, Vol.

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Erratum: Indirect model-dependent probe of the Higgs self-coupling [Phys. Computer Physics Communications, Vol. FastJet user manual: for version 3. What is the criterion for a strong first order electroweak phase transition in singlet models?Here, we present benchmark scenarios for searches for an additional Higgs state in the real Higgs singlet extension of the Standard Model in Run 2 of the LHC.

The scenarios are selected such that they ful ll all relevant current theoretical and experimental constraints, but can potentially be discovered at the current LHC run.

We take into account the results presented in earlier work and update the experimental constraints from relevant LHC Higgs searches and signal rate measurements. The benchmark scenarios are given separately for the low mass and high mass region, i. Works referenced in this record:. GOV collections:. Title: LHC benchmark scenarios for the real Higgs singlet extension of the standard model.

Robens, Tania, and Stefaniak, Tim. LHC benchmark scenarios for the real Higgs singlet extension of the standard model. Germany: N. Copy to clipboard. Free Publicly Available Full Text. Copyright Statement. Other availability. Search WorldCat to find libraries that may hold this journal.

Cited by: 24 works. Citation information provided by Web of Science. LinkedIn Pinterest Tumblr. Physical Review Letters, Vol. Sekhar; Simmons, Elizabeth H. Computer Physics Communications, Vol. Physical Review D, Vol. HiggsBounds 2. Physical Review, Vol. Physics Letters B, Vol. Physics Letters, Vol. Journal of High Energy Physics, Vol.

All References journal 72 Search Sort by title. Sort by date. All Cited By journal 1 Search Sort by title. Similar Records.We consider the Standard Model SM extended by the addition of a complex scalar singlet, with no assumptions about additional symmetries of the potential.

This model provides for resonant di-Higgs production of Higgs particles with different masses.

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We demonstrate that regions of parameter space allowed by precision electroweak measurements, experimental limits on single Higgs production, and perturbative unitarity allow for large di-Higgs production rates relative to the SM rates. Works referenced in this record:. GOV collections:. Title: Enhanced di-Higgs boson production in the complex Higgs singlet model.

Abstract We consider the Standard Model SM extended by the addition of a complex scalar singlet, with no assumptions about additional symmetries of the potential. Authors: Dawson, S. Dawson, S. Enhanced di-Higgs boson production in the complex Higgs singlet model.

United States: N. Copy to clipboard. United States. Free Publicly Available Full Text. Copyright Statement. Other availability. Search WorldCat to find libraries that may hold this journal.

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Cited by: 6 works. Citation information provided by Web of Science. LinkedIn Pinterest Tumblr. Journal of High Energy Physics, Vol. Physical Review D, Vol. Nuclear Physics B, Vol. Physics Letters B, Vol. Physical Review Letters, Vol. All References journal 33 Search Sort by title. Sort by date. Similar Records.A newfound particle discovered at the world's largest atom smasher last year is, indeed, a Higgs boson, the particle thought to explain how other particles get their mass, scientists reported today March 14 at the annual Rencontres de Moriond conference in Italy.

Physicists announced on July 4,that, with more than 99 percent certainty, they had found a new elementary particle weighing about times the mass of the proton that was likely the long-sought Higgs boson. The Higgs is sometimes referred to as the "God particle," to the chagrin of many scientistswho prefer its official name. But the two experiments, CMS and ATLAS, hadn't collected enough data to say the particle was, for sure, the Higgs boson, the last undiscovered piece of the puzzle predicted by the Standard Modelthe reigning theory of particle physics.

Now, after collecting two and a half times more data inside the Large Hadron Collider LHC — where protons zip at near light-speed around the mile-long 27 kilometer underground ring beneath Switzerland and France — physicists say the particle is a Higgs. Dave Charlton, ATLAS spokesperson agreed, the new results "point to the new particle having the spin-parity of a Higgs boson as in the Standard Model," referring to a quantum property of elementary particles.

To confirm the particle as a Higgs boson, physicists needed to collect tons of data that would reveal its quantum properties as well as how it interacted with other particles. For instance, a Higgs particle should have no spin and its parity, or the measure of how its mirror image behaves, should be positive, both of which were supported by data from the ATLAS and CMS experiments.

Even so, the scientists are not sure whether this Higgs boson is the one predicted by the Standard Model or perhaps the lightest of several bosons predicted to exist by other theories.

Seeing how this particle decays into other particles could let physicists know whether this Higgs is the "plain vanilla" Standard Model Higgs.

Confirmed! Newfound Particle Is a Higgs Boson

Detecting a Higgs boson is rare, with just one observed for every 1 trillion proton-proton collisions. As such, the LHC physicists say they need much more data to understand all of the ways in which the Higgs decays.

From what is known about the particle now, physicists have said the Higgs boson may spell the universe's doom in the very far future. That's because the mass of the Higgs boson is a critical part of a calculation that portends the future of space and time. Its mass of times the mass of the proton is just about what would be needed to create a fundamentally unstable universe that would lead to a cataclysm billions of years from now. Original article on LiveScience.

Live Science. Please deactivate your ad blocker in order to see our subscription offer. Proton-proton collisions at the Large Hadron Collider show events consistent with the Higgs boson particle.In this note we propose an overview on the current theoretical and experimental limits on a Higgs singlet extension of the Standard Model. We assume that the Boson which has recently been measured by the LHC experiments is the lightest Higgs boson of such model, while for the second Higgs Boson we consider a mass range of GeV to 1 TeV, i.

In this light, we study the impact of perturbative unitarity limits, Renormalisation Group Equations analysis and experimental constraints Electro-Weak Precision Tests, measurements of the light Higgs coupling at the Large Hadron Collider. We show that, in the case of no additional hidden sector contributions, the largest constraints for higher Higgs masses stem from the assumption of perturbativity as well as vacuum stability for scales on the order of the SM metastability scale, and that the allowed mixing range is severely restricted.

We discuss implications for current LHC searches in the singlet extension, especially the expected suppression factors for SM-like decays of the heavy Higgs.

We present these results in terms of a global scaling factor as well as the total width of the new scalar. Comment: 30 pages, 11 figures; v2: slight modifications, several comments and references added; v3: one figure, references added and typographical errors corrected; corresponds to published journal versio.

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higgs singlet extension in the light of the lhc discovery

Topics: High Energy Physics - Phenomenology. OAI identifier: oai:arXiv. Provided by: arXiv.

higgs singlet extension in the light of the lhc discovery

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higgs singlet extension in the light of the lhc discovery

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higgs singlet extension in the light of the lhc discovery

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