![Search for Exotic Decays of the Higgs Boson Into B[overline] and Missing Transverse Momentum in Pp Collisions at [square Root]s PDF](https://books.google.com/books/content/images/frontcover/wa_ezwEACAAJ?fife=w150-h200)
Author: [Study Group] ATLAS Collaboration CERNPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Search for Exotic Decays of the Higgs Boson Into B[overline] and Missing Transverse Momentum in Pp Collisions at [square Root]s
![Search for Exotic Decays of the Higgs Boson Into B[overline] and Missing Transverse Momentum in Pp Collisions at [square Root]s PDF](https://books.google.com/books/content/images/frontcover/wa_ezwEACAAJ?fife=w80-h100)
Author: [Study Group] ATLAS Collaboration CERNPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Search for Invisible Decays of the Higgs Boson Produced in Association with a Hadronically Decaying Vector Boson in Pp Collisions at [arrow]"
![Search for Invisible Decays of the Higgs Boson Produced in Association with a Hadronically Decaying Vector Boson in Pp Collisions at [arrow]](https://books.google.com/books/content/images/frontcover/XhiuAQAACAAJ?fife=w80-h100)
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
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
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
![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 PDF](https://books.google.com/books/content/images/frontcover/edbczwEACAAJ?fife=w80-h100)
Author: [Study Group] ATLAS Collaboration CERNPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Searches for Invisible Decays of the Higgs Boson in Pp Collisions at $\sqrt{s}$
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Searches for invisible decays of the Higgs boson are presented. The data collected with the CMS detector at the LHC correspond to integrated luminosities of 5.1, 19.7, and 2.3 inverse femtobarns at centre-of-mass energies of 7, 8, and 13 TeV, respectively. The search channels target Higgs boson production via gluon fusion, vector boson fusion, and in association with a vector boson. Upper limits are placed on the branching fraction of the Higgs boson decay to invisible particles, as a function of the assumed production cross sections. The combination of all channels, assuming standard model production, yields an observed (expected) upper limit on the invisible branching fraction of 0.24 (0.23) at the 95% confidence level. The results are also interpreted in the context of Higgs-portal dark matter models.
Search for Invisible Decays of the Higgs Boson Produced in Vector-boson Fusion in Final States with Jets and Large Missing Transverse Energy with the ATLAS Detector
Author: Vincent KitaliSearch for Exotic Decays of the Higgs Boson to a Pair of New Light Bosons in the Final States with Four Bottom Quarks
Author: Seyyed Mohammad Amin Ghiasi ShiraziPublisher:
ISBN: 9781392170120
Category : Higgs bosons
Languages : en
Pages : 197
Book Description
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
Search for a CP-Odd Higgs Boson Decaying to Z H in Pp Collisions at [square Root]s
![Search for a CP-Odd Higgs Boson Decaying to Z H in Pp Collisions at [square Root]s PDF](https://books.google.com/books/content/images/frontcover/eruE0AEACAAJ?fife=w80-h100)
Author: Hannah ArnoldSearch for an Exotic Decay of the Higgs Boson to a Pair of Light Pseudoscalars in the Final State of Two Muons and Two $\tau$ Leptons in Proton-proton Collisions at √s
Author: Search for Exotic Decays of a Higgs Boson Into Undetectable Particles and One Or More Photons
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Book Description
A search is presented for exotic decays of a Higgs boson into undetectable particles and one or two isolated photons in pp collisions at a center-of-mass energy of 8 TeV. The data correspond to an integrated luminosity of up to 19.4 inverse femtobarns collected with the CMS detector at the LHC. Higgs bosons produced in gluon-gluon fusion and in association with a Z boson are investigated, using models in which the Higgs boson decays into a gravitino and a neutralino or a pair of neutralinos, followed by the decay of the neutralino to a gravitino and a photon. The selected events are consistent with the background-only hypothesis, and limits are placed on the product of cross sections and branching fractions. Assuming a standard model Higgs boson production cross section, a 95% confidence level upper limit is set on the branching fraction of a 125 GeV Higgs boson decaying into undetectable particles and one or two isolated photons as a function of the neutralino mass. For this class of models and neutralino masses from 1 to 120 GeV an upper limit in the range of 7 to 13% is obtained. Further results are given as a function of the neutralino lifetime, and also for a range of Higgs boson masses.
Supersymmetric Exotic Decays of the 125 GeV Higgs Boson
Author: Publisher:
ISBN:
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Languages : en
Pages :
Book Description
We reveal a set of novel decay topologies for the 125 GeV Higgs boson in supersymmetry which are initiated by its decay into a pair of neutralinos, and discuss their collider search strategies. This category of exotic Higgs decays are characterized by the collider signature: visible objects + $\mbox{${\not\! E}_{\rm T}$}$, with $\mbox{${\not\! E}_{\rm T}$}$ dominantly arising from escaping dark matter particles. Their benchmark arises naturally in the Peccei-Quinn symmetry limit of the MSSM singlet-extensions, which is typified by the co-existence of three light particles: singlet-like scalar $h_1$ and pseudoscalar $a_1$, and singlino-like neutralino $\chi_1$, all with masses of $\lesssim 10$ GeV, and the generically suppression of the exotic decays of the 125 GeV Higgs boson $h_2\to h_1 h_1$, $a_1a_1$ and $\chi_1\chi_1$, however. As an illustration, we study the decay topology: $h_2 \to \chi_1 \chi_2$, where the bino-like $\chi_2$ decays to $h_1 \chi_1$ or $a_1 \chi_1$, and $h_1/a_1 \to f\bar f$, with $f\bar f = \mu^+\mu^-$, $b\bar b$. In the di-muon case ($m_{h_1/a_1} \sim 1$ GeV), a statistical sensitivity of $\frac{S}{\sqrt{B}}> 6 \sigma$ can be achieved easily at the 8 TeV LHC, assuming $\frac{\sigma(pp \rightarrow W h_2)}{\sigma(pp \rightarrow W h_{\rm SM})} {\rm Br}(h_2 \to \mu^+\mu^- \chi_1 \chi_1)=0.1$. In the $b\bar b$ case ($m_{h_1/a_1} \sim 45$ GeV), 600 fb$^{-1}$ data at the 14 TeV LHC can lead to a statistical sensitivity of $\frac{S}{\sqrt{B}}> 5 \sigma$, assuming $\frac{\sigma(pp \rightarrow Z h_2)}{\sigma(pp \rightarrow Z h_{\rm SM})} {\rm Br}(h_2 \to b\bar b \chi_1 \chi_1)=0.5$. These exotic decays open a new avenue for exploring new physics couplings with the 125 GeV Higgs boson at colliders.