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Scalar Boson Decays to Tau Leptons

2017-11-15 Science
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Release : 2017-11-15
Genre : Science
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Book Rating : 500/5 ( reviews)

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Book Synopsis Scalar Boson Decays to Tau Leptons by : Cécile Caillol

Download or read book Scalar Boson Decays to Tau Leptons written by Cécile Caillol. This book was released on 2017-11-15. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a study of the scalar sector in the standard model (SM), as well as various searches for an extended scalar sector in theories beyond the SM (BSM). The first part of the thesis details the search for an SM Higgs boson decaying to taus, and produced by gluon fusion, vector boson fusion, or associated production with a vector boson, leading to evidence for decays of the Higgs boson to taus. In turn, the second part highlights several searches for an extended scalar sector, with scalar boson decays to taus. In all of the analyses presented, at least one scalar boson decays to a pair of taus. The results draw on data collected by the Compact Muon Solenoid (CMS) detector during proton–proton collisions with a center-of-mass energy of 7 or 8 TeV.

Search for a Very Light NMSSM Higgs Boson Produced in Decays of the 125 GeV Scalar Boson and Decaying Into Tau Leptons in Pp Collisions at the LHC

2016 Higgs bosons
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Release : 2016
Genre : Higgs bosons
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Book Rating : 963/5 ( reviews)

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Book Synopsis Search for a Very Light NMSSM Higgs Boson Produced in Decays of the 125 GeV Scalar Boson and Decaying Into Tau Leptons in Pp Collisions at the LHC by : Amithabh Shrinivas

Download or read book Search for a Very Light NMSSM Higgs Boson Produced in Decays of the 125 GeV Scalar Boson and Decaying Into Tau Leptons in Pp Collisions at the LHC written by Amithabh Shrinivas. This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: A search for a very light Higgs boson decaying into a pair of tau leptons is presented within the framework of the next-to-minimal supersymmetric standard model(NMSSM). This search is based on a data set corresponding to an integrated luminosity of 19.7 fb-1 and 2.5 fb-1 of proton-proton collisions collected by the CMS experiment at a centre-of-mass energy of 8 TeV and 13 TeV respectively. The signal consists of the production of either of the two lightest scalars, h1 or h2, via gluon-gluon fusion and subsequent decay into a pair of the lightest Higgs bosons, a1 or h1. The h1 or h2 boson is identified with the observed state at a mass of 125 GeV. The analysis searches for decays of the a1(h1) states into pairs of tau leptons and covers a mass range for the a1(h1) boson of 4 to 15 GeV. The search reveals no significant excess in data above standard model background expectations, and an upper limit is set on the signal production cross section times branching fraction as a function of the a 1(h1) boson mass.

Search for a Very Light NMSSM Higgs Boson Produced in Decays of the 125 GeV Scalar Boson and Decaying Into $\tau$ Leptons in Pp Collisions at $\sqrt{s}

2015
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Release : 2015
Genre :
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Book Synopsis Search for a Very Light NMSSM Higgs Boson Produced in Decays of the 125 GeV Scalar Boson and Decaying Into $\tau$ Leptons in Pp Collisions at $\sqrt{s} by :

Download or read book Search for a Very Light NMSSM Higgs Boson Produced in Decays of the 125 GeV Scalar Boson and Decaying Into $\tau$ Leptons in Pp Collisions at $\sqrt{s} written by . This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: Our search for a very light Higgs boson decaying into a pair of t leptons is presented within the framework of the next-to-minimal supersymmetric standard model. This search is based on a data set corresponding to an integrated luminosity of 19.7 fb-1 of proton-proton collisions collected by the CMS experiment at a centre-of-mass energy of 8 TeV. The signal is defined by the production of either of the two lightest scalars, h1 or h2, via gluon-gluon fusion and subsequent decay into a pair of the lightest Higgs bosons, a1 or h1. The h1 or h2 boson is identified with the observed state at a mass of 125 GeV. The analysis searches for decays of the a1 (h1) states into pairs of t leptons and covers a mass range for the a1 (h1) boson of 4 to 8 GeV. Furthermore, the search reveals no significant excess in data above standard model background expectations, and an upper limit is set on the signal production cross section times branching fraction as a function of the a1 (h1) boson mass. The 95% confidence level limit ranges from 4.5 pb at ma1 (mh1) = 8 GeV to 10.3 pb at ma1 (mh1) = 5 GeV.

Search for Higgs Boson Decays to Long-Lived Scalar Particles in Pp Interactions at 13 TeV

2020 Physics
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Release : 2020
Genre : Physics
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Book Synopsis Search for Higgs Boson Decays to Long-Lived Scalar Particles in Pp Interactions at 13 TeV by : Daniel Cipriano Diaz

Download or read book Search for Higgs Boson Decays to Long-Lived Scalar Particles in Pp Interactions at 13 TeV written by Daniel Cipriano Diaz. This book was released on 2020. Available in PDF, EPUB and Kindle. Book excerpt: Presented in this thesis are the results of a novel search for exotic particles produced at the Large Hadron Collider (LHC). The search is performed using the data collected by the Compact Muon Solenoid (CMS) detector during the Run II period (2016 - 2018) of data taking. The data corresponds to a total integrated luminosity of 117fb-1, recorded at [square root of s] = 13 TeV. The search is performed in the topology where the Higgs boson is produced in association with a Z boson. The Higgs boson may decay to two exotic long-lived scalar particles (S). Final states where the long-lived particle decays to pairs of either b-quarks, d-quarks or [tau]-leptons are considered. No significant excess in the data with respect to the expected number of events containing decays to long-lived particles was observed. Limits are set on the branching ratio BR(H-SS) for the final states where the long-lived particle decays to pairs of b-quarks or d-quarks. No limit is set for the final state containing decays of the long-lived particles to pairs of [tau]-leptons. The limits reflect the most stringent results for the decays of the scalar particles to low mass ( 20 GeV) particles with lifetimes in the range 10 c[tau]

Searches for a Heavy Scalar Boson $ \mathrm{H} $ Decaying to a Pair of 125 GeV Higgs Bosons $ \mathrm{ Hh } $ Or for a Heavy Pseudoscalar Boson $ \mathrm{A} $ Decaying to $ \mathrm{Zh} $, in the Final States with $\mathrm{h} \to \tau \tau$

2015
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Release : 2015
Genre :
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Book Synopsis Searches for a Heavy Scalar Boson $ \mathrm{H} $ Decaying to a Pair of 125 GeV Higgs Bosons $ \mathrm{ Hh } $ Or for a Heavy Pseudoscalar Boson $ \mathrm{A} $ Decaying to $ \mathrm{Zh} $, in the Final States with $\mathrm{h} \to \tau \tau$ by :

Download or read book Searches for a Heavy Scalar Boson $ \mathrm{H} $ Decaying to a Pair of 125 GeV Higgs Bosons $ \mathrm{ Hh } $ Or for a Heavy Pseudoscalar Boson $ \mathrm{A} $ Decaying to $ \mathrm{Zh} $, in the Final States with $\mathrm{h} \to \tau \tau$ written by . This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt:

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