Search For Pair Produced First And Second Generation Scalar Leptoquarks In Pp Collisions At Sqrts
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Search For Pair Produced First And Second Generation Scalar Leptoquarks In Pp Collisions At Sqrts
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Author : Anton Wolf
language : en
Publisher:
Release Date : 2021
Search For Pair Produced First And Second Generation Scalar Leptoquarks In Pp Collisions At Sqrts written by Anton Wolf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
The Physics Associated With Neutrino Masses
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Author : Diego Aristizabal Sierra
language : en
Publisher: Frontiers Media SA
Release Date : 2020-01-13
The Physics Associated With Neutrino Masses written by Diego Aristizabal Sierra and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-13 with categories.
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Search For First Generation Scalar Leptoquarks In The Evjj Channel In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2011
Search For First Generation Scalar Leptoquarks In The Evjj Channel In Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A search for pair-production of first generation scalar leptoquarks is performed in the final state containing an electron, a neutrino, and at least two jets using proton-proton collision data at sqrt(s)=7 TeV. The data were collected by the CMS detector at the LHC, corresponding to an integrated luminosity of 36 inverse picobarns. The number of observed events is in good agreement with the predictions for standard model processes. Prior CMS results in the dielectron channel are combined with this electron+neutrino search. A 95% confidence level combined lower limit is set on the mass of a first generation scalar leptoquark at 340 GeV for beta=0.5, where beta is the branching fraction of the leptoquark to an electron and a quark. These results represent the most stringent direct limits to date for values of beta greater than 0.05.
Search For Pair Production Of First And Second Generation Leptoquarks In Proton Proton Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2015
Search For Pair Production Of First And Second Generation Leptoquarks In Proton Proton Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Our search for pair production of first and second generation leptoquarks is performed in final states containing either two charged leptons and two jets, or one charged lepton, one neutrino and two jets, using proton-proton collision data at √s = 8 TeV. The data, corresponding to an integrated luminosity of 19.7 fb-1, were recorded with the CMS detector at the LHC. First-generation scalar leptoquarks with masses less than 1010 (850) GeV are excluded for [beta] = 1.0 (0.5), where b is the branching fraction of a leptoquark decaying to a charged lepton and a quark. Similarly, secondgeneration scalar leptoquarks with masses less than 1080 (760) GeV are excluded for [beta] = 1.0 (0.5). Furthermore, mass limits are also set for vector leptoquark production scenarios with anomalous vector couplings, and for R-parity violating supersymmetric scenarios of top squark pair production resulting in similar final-state signatures. These are the most stringent limits placed on the masses of leptoquarks and RPV top squarks to date.
Search For Pair Production Of Second Generation Scalar Leptoquarks In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2010
Search For Pair Production Of Second Generation Scalar Leptoquarks In Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Search For Scalar Leptoquarks In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2016
Search For Scalar Leptoquarks In Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
An inclusive search for a new-physics signature of lepton-jet resonances has been performed by the ATLAS experiment. Scalar leptoquarks, pair-produced in pp collisions at $\sqrt{s}$ = 13 TeV at the large hadron collider, have been considered. An integrated luminosity of 3.2 fb-1, corresponding to the full 2015 dataset was used. First (second) generation leptoquarks were sought in events with two electrons (muons) and two or more jets. The observed event yield in each channel is consistent with Standard Model background expectations. The observed (expected) lower limits on the leptoquark mass at 95% confidence level are 1100 and 1050 GeV (1160 and 1040 GeV) for first and second generation leptoquarks, respectively, assuming a branching ratio into a charged lepton and a quark of 100%. Upper limits on the aforementioned branching ratio are also given as a function of leptoquark mass. In conclusion, compared with the results of earlier ATLAS searches, the sensitivity is increased for leptoquark masses above 860 GeV, and the observed exclusion limits confirm and extend the published results.
Search For Pair Production Of First Generation Scalar Leptoquarks In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2010
Search For Pair Production Of First Generation Scalar Leptoquarks In Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Search For First Generation Scalar Leptoquarks In P Anti P Collisions At S 1 2
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Author :
language : en
Publisher:
Release Date : 2005
Search For First Generation Scalar Leptoquarks In P Anti P Collisions At S 1 2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
We report on a search for pair production of first-generation scalar leptoquarks (LQ) in pp collisions at √(s)=1.96 TeV using an integrated luminosity of 203 pb−1 collected at the Fermilab Tevatron collider by the CDF experiment. We observe no evidence for LQ production in the topologies arising from LQLQ→eqeq and LQLQ→eq?q, and derive 95% C.L. upper limits on the LQ production cross section. The results are combined with those obtained from a separately reported CDF search in the topology arising from LQLQ→?q?q and 95% C.L. lower limits on the LQ mass as a function of ?=BR(LQ→eq) are derived. The limits are 236, 205 and 145 GeV/c2 for ?=1, ?=0.5 and ?=0.1, respectively.
Search For Pair Production Of First Or Second Generation Leptoquarks In Proton Proton Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2013
Search For Pair Production Of First Or Second Generation Leptoquarks In Proton Proton Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Search For Pair Production Of Second Generation Scalar Leptoquarks In Ppbar Collisions At The Tevatron
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Author :
language : en
Publisher:
Release Date : 2008
Search For Pair Production Of Second Generation Scalar Leptoquarks In Ppbar Collisions At The Tevatron written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
As predicted by numerous extensions of the Standard Model, leptoquarks (LQ) are hypothetical bosons allowing lepton-quark transitions. Under the assumption that they couple only to quarks and leptons of the same generation, three generations of leptoquarks can be distinguished. The search for the pair production of second generation scalar leptoquarks has been carried out in p{bar p} collisions at √s = 1.96TeV, using an integrated luminosity of 1 fb−1 collected by the D0 experiment at the Tevatron collider between August 2002 and February 2006. Topologies arising from the LQ{ovr LQ} → [mu]q[nu]q and LQ{ovr LQ} → [mu]q[mu]q decay modes have been investigated. In order to maximize the available statistics, a method for the combination of various prescaled triggers with an inclusive OR has been developed. Since no excess of data over the Standard Model prediction has been observed, upper limits on the leptoquark pair production cross section have been derived at 95% confidence level as function of the leptoquark mass and the branching fraction [beta] = Br(LQ → [mu]q), and are interpreted as lower limits on the leptoquark mass as function of [beta]. For [beta] = 1, [beta] = 1/2 and [beta] = 0.1, the combination of the two channels excludes scalar second generation leptoquarks with masses up to 309GeV, 262GeV, and 174GeV, respectively. The lower bounds on the scalar second generation leptoquark mass obtained for [beta] ≥ 0.1 are the best exclusion limits to date.