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Search For Higgs Bosons Decaying To Aa In The Final State In Pp Collisions At U221as
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Book Synopsis Search for Higgs Bosons Decaying to aa in the ???? Final State in pp Collisions at {u221A}s by :
Download or read book Search for Higgs Bosons Decaying to aa in the ???? Final State in pp Collisions at {u221A}s written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for the decay to a pair of new particles of either the 125 GeV Higgs boson (h) or a second charge parity (CP)-even Higgs boson (H) is presented. The data set corresponds to an integrated luminosity of 20.3 fb-1 of pp collisions at √s = 8 TeV recorded by the ATLAS experiment at the LHC in 2012. The search was done in the context of the next-to-minimal supersymmetric standard model, in which the new particles are the lightest neutral pseudoscalar Higgs bosons (a). One of the two a bosons is required to decay to two muons while the other is required to decay to two ? leptons. No significant excess is observed above the expected backgrounds in the dimuon invariant mass range from 3.7 to 50 GeV. Upper limits are placed on the production of h → aa relative to the standard model gg → h production, assuming no coupling of the a boson to quarks. The most stringent limit is placed at 3.5% for ma = 3.75 GeV. The upper limits are also placed on the production cross section of H → aa from 2.33 to 0.72 pb, for fixed ma = 5 GeV with mH ranging from 100 to 500 GeV.
Book Synopsis Search for Higgs Bosons Decaying to Aa in the [mu][mu][tau][tau] Final State in Pp Collisions at [arrow]" by :
Download or read book Search for Higgs Bosons Decaying to Aa in the [mu][mu][tau][tau] Final State in Pp Collisions at [arrow]" written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for the decay to a pair of new particles of either the 125 GeV Higgs boson (h) or a second charge parity (CP)-even Higgs boson (H) is presented. The data set corresponds to an integrated luminosity of 20.3 fb-1 of pp collisions at [arrow]" = 8 TeV recorded by the ATLAS experiment at the LHC in 2012. The search was done in the context of the next-to-minimal supersymmetric standard model, in which the new particles are the lightest neutral pseudoscalar Higgs bosons (a). One of the two a bosons is required to decay to two muons while the other is required to decay to two [tau] leptons. No significant excess is observed above the expected backgrounds in the dimuon invariant mass range from 3.7 to 50 GeV. The upper limits are placed on the production of h 2!aa relative to the standard model gg 2!h production, assuming no coupling of the a boson to quarks. The most stringent limit is placed at 3.5% for ma = 3.75 GeV. Upper limits are also placed on the production cross section of H 2!aa from 2.33 to 0.72 pb, for fixed ma = 5 GeV with mH ranging from 100 to 500 GeV.
Book Synopsis Search for a CP-odd Higgs Boson Decaying to Zh in Pp Collisions at {u221A}s by :
Download or read book Search for a CP-odd Higgs Boson Decaying to Zh in Pp Collisions at {u221A}s written by and published by . This book was released on 2015 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for a heavy, CP-odd Higgs boson, A, decaying into a Z boson and a 125 GeV Higgs boson, h, with the ATLAS detector at the LHC is presented. The search uses proton–proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3fb-1. Decays of CP-even h bosons to ?? or bb pairs with the Z boson decaying to electron or muon pairs are considered, as well as h → bb decays with the Z boson decaying to neutrinos. No evidence for the production of an A boson in these channels is found and the 95% confidence level upper limits derived for ?(gg → A) × BR(A → Zh) × BR(h → f¯f) are 0.098–0.013pb for f = ? and 0.57–0.014 pb for f = b in a range of mA=220–1000 GeV. The results are combined and interpreted in the context of two-Higgs-doublet models.
Book Synopsis Search for Charged Higgs Bosons Decaying Into a Top and a Bottom Quark in the All-jet Final State of Pp Collisions at √s by : Albert M. Sirunyan
Download or read book Search for Charged Higgs Bosons Decaying Into a Top and a Bottom Quark in the All-jet Final State of Pp Collisions at √s written by Albert M. Sirunyan and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for a Heavy CP-odd Higgs Boson A Decaying to a Z Boson and a Heavy CP-even Higgs Boson H with Llbb Final State in 13 TeV Pp Collisions with the ATLAS Detector by : Wai Yuen Chan
Download or read book Search for a Heavy CP-odd Higgs Boson A Decaying to a Z Boson and a Heavy CP-even Higgs Boson H with Llbb Final State in 13 TeV Pp Collisions with the ATLAS Detector written by Wai Yuen Chan and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Higgs Boson Decays Into a Pair of Pseudoscalar Particles in the Bb[my][my] Final State with the ATLAS Detector in Pp Collisions at [square Root]s by : [Study Group] ATLAS Collaboration CERN
Download or read book Search for Higgs Boson Decays Into a Pair of Pseudoscalar Particles in the Bb[my][my] Final State with the ATLAS Detector in Pp Collisions at [square Root]s written by [Study Group] ATLAS Collaboration CERN and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Higgs Bosons Decaying Into New Spin-0 Or Spin-1 Particles in Four-lepton Final States with the ATLAS Detector with 139 Fb−1 of Pp Collision Data at [square Root]s by : [Study Group] ATLAS Collaboration CERN
Download or read book Search for Higgs Bosons Decaying Into New Spin-0 Or Spin-1 Particles in Four-lepton Final States with the ATLAS Detector with 139 Fb−1 of Pp Collision Data at [square Root]s written by [Study Group] ATLAS Collaboration CERN and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Invisible Decays of the Higgs Boson Produced in Association with a Hadronically Decaying Vector Boson in Pp Collisions at [arrow]" by :
Download or read book Search for Invisible Decays of the Higgs Boson Produced in Association with a Hadronically Decaying Vector Boson in Pp Collisions at [arrow]" written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for Higgs boson decays to invisible particles is performed using 20.3 fb−1 of pp collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. The process considered is Higgs boson production in association with a vector boson (V = W or Z) that decays hadronically, resulting in events with two or more jets and large missing transverse momentum. No excess of candidates is observed in the data over the background expectation. The results are used to constrain V H production followed by H decaying to invisible particles for the Higgs boson mass range 115
Book Synopsis Search for Resonances Decaying to a Pair of Higgs Bosons in the Bb̄qq̄′lν Final State in Proton-proton Collisions at √s by : Albert M. Sirunyan
Download or read book Search for Resonances Decaying to a Pair of Higgs Bosons in the Bb̄qq̄′lν Final State in Proton-proton Collisions at √s written by Albert M. Sirunyan and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for a Higgs Boson Decaying Into a Z and a Photon in Pp Collisions at $\sqrt{s}$ by :
Download or read book Search for a Higgs Boson Decaying Into a Z and a Photon in Pp Collisions at $\sqrt{s}$ written by and published by . This book was released on 2013 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Exotic Decays of the Higgs Boson to a Pair of New Light Bosons in the Final States with Four Bottom Quarks by : Seyyed Mohammad Amin Ghiasi Shirazi
Download or read book Search for Exotic Decays of the Higgs Boson to a Pair of New Light Bosons in the Final States with Four Bottom Quarks written by Seyyed Mohammad Amin Ghiasi Shirazi and published by . This book was released on 2019 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, we present a search for non-standard decay of the Standard Model-like Higgs boson to a pair of pseudoscalar lighter bosons H →aa with 12 Geva/sub
Book Synopsis Search for a Light Charged Higgs Boson Decaying to $ \mathrm{ C \bar{s} } $ in Pp Collisions at $ \sqrt{s} by :
Download or read book Search for a Light Charged Higgs Boson Decaying to $ \mathrm{ C \bar{s} } $ in Pp Collisions at $ \sqrt{s} written by and published by . This book was released on 2015 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Charged Higgs Bosons in the τ + LEPTON Final State With 36.1 fb–1 of pp Collision Data Recorded at √s by : Blake Burghgrave
Download or read book Search for Charged Higgs Bosons in the τ + LEPTON Final State With 36.1 fb–1 of pp Collision Data Recorded at √s written by Blake Burghgrave and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for Exotic Higgs Decays by : Jackson Burzynski
Download or read book A Search for Exotic Higgs Decays written by Jackson Burzynski and published by Springer Nature. This book was released on 2023-05-23 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: The absence of new physics at the TeV scale observed thus far at the Large Hadron Collider (LHC) motivates an increasing focus on searches for weakly-coupled new particles and exotic signatures. In particular, particles with macroscopic mean proper lifetimes, known as long-lived particles (LLPs), are of significant interest due to their ability to elude the majority of searches which rely on the assumption that Beyond Standard Model particles decay close to the primary interaction point. Many models which aim to solve various issues with the Standard Model (SM) introduce new particles with lifetimes that are either unconstrained, or even shown to prefer the macroscopic regime. These theories often point to the Higgs boson as a possible portal to new physics, with exotic Higgs decays being the primary phenomenological consequence and means of discovery. It is well motivated both from theory and experimental constraints to consider the scenario in which the particles produced in these exotic decays have macroscopic proper lifetimes and give rise to unique detector signatures. This work describes a search for exotic decays of the Higgs boson to two long-lived, neutral, spin-0 particles which subsequently decay to pairs of b quarks, giving the striking signature of displaced hadronic jets in the ATLAS inner detector. Several other ATLAS searches have probed this decay topology previously, excluding branching ratios of the Higgs boson to LLPs of more than 10% for proper lifetimes greater than 100mm. These searches relied on dedicated triggers designed to select events with LLPs decaying in the ATLAS calorimeter or muon spectrometer. The lack of an equivalent trigger for LLP decays in the ATLAS inner detector has been a limiting factor in probing LLP lifetimes less than 100mm. To circumvent the difficulty of triggering on LLP decays, the search presented in this thesis exploits the ZH associated production mode, relying on leptonic trigger signatures to select interesting events. This is the first search for Higgs boson decays into LLPs to exploit this analysis methodology and additionally makes use of several novel methods for both background rejection and background estimation. No excess over Standard Model predictions is observed, and upper limits are set on the branching ratio of the Higgs boson to LLPs . Depending on the mass of the LLP, branching ratios greater than 10% are excluded for lifetimes as small as 4mm and as large as 100mm, probing an important gap in the ATLAS exotic Higgs decay programme. In comparison to the previous searches for Higgs decays to LLPs, these are among the most stringent limits placed on this scenario, and for LLPs with masses below 40 GeV these results represent the strongest existing constraints on the branching ratio of the Higgs boson to LLPs in this lifetime regime.
Book Synopsis Search for Top-squark Pairs Decaying Into Higgs Or Z Bosons in Pp Collisions at [arow]" by :
Download or read book Search for Top-squark Pairs Decaying Into Higgs Or Z Bosons in Pp Collisions at [arow]" written by and published by . This book was released on 2014 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Neutral Higgs Bosons Decaying to Tau Pairs in P Anti-p Collisions at S**(1/2) by :
Download or read book Search for Neutral Higgs Bosons Decaying to Tau Pairs in P Anti-p Collisions at S**(1/2) written by and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for the production of neutral Higgs bosons ? decaying into ?+?− final states in p{bar p} collisions at a center-of-mass energy of 1.96 TeV is presented. The data, corresponding to an integrated luminosity of approximately 325 pb−1, were collected by the D0 experiment at the Fermilab Tevatron Collider. Since no excess compared to the expectation from standard model processes is found, limits on the production cross section times branching ratio are set. The results are combined with those obtained from the D0 search for ?b({bar b}) → b{bar b}b({bar b}) and are interpreted in the minimal supersymmetric standard model.
Book Synopsis Search for Higgs Bosons Decaying to $\tau$ Pairs in $p \bar{p}$ Collisions with the D0 Detector by :
Download or read book Search for Higgs Bosons Decaying to $\tau$ Pairs in $p \bar{p}$ Collisions with the D0 Detector written by and published by . This book was released on 2008 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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