Search For First Generation Leptoquarks In The Ejj And Eejj Decay Channels In Pp Collisions At S
Download Search For First Generation Leptoquarks In The Ejj And Eejj Decay Channels In Pp Collisions At S full books in PDF, epub, and Kindle. Read online free Search For First Generation Leptoquarks In The Ejj And Eejj Decay Channels In Pp Collisions At S ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Search for First Generation Leptoquarks in the Eνjj and Eejj Decay Channels in Pp̄ Collisions at √s
| Author | : Federica Strumia |
| Publisher | : |
| Total Pages | : 205 |
| Release | : 2001 |
| Genre | : |
| ISBN | : |
Le sujet de cette thèse est la recherche des leptoquarks scalaires et vectoriels de première génération produits en couple dans des collisions proton-antiproton à une énergie du centre de masse de 1.8 TeV et se désintégrant dans les canaux "e[nu]jj" et "eejj". L'analyse a été conduite sur les données récoltées par l'expérience CDF pendant la période 1992-1995.
Search for First Generation Leptoquarks in the "e[nu]jj" and "eejj" Decay Channels in "p Pbar" Collisions at "sqrt(s)"
| Author | : Federica Strumia |
| Publisher | : |
| Total Pages | : 205 |
| Release | : 2001 |
| Genre | : |
| ISBN | : |
Le sujet de cette thèse est la recherche des leptoquarks scalaires et vectoriels de première génération produits en couple dans des collisions proton-antiproton à une énergie du centre de masse de 1.8 TeV et se désintégrant dans les canaux "e[nu]jj" et "eejj". L'analyse a été conduite sur les données récoltées par l'expérience CDF pendant la période 1992-1995.
Search for First Generation Scalar Leptoquarks in the Evjj Channel in Pp Collisions at Sqrt(s)
| Author | : |
| Publisher | : |
| Total Pages | : 29 |
| Release | : 2011 |
| Genre | : |
| ISBN | : |
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 First Generation Leptoquark Pair Production in the Electron + Missing Energy + Jets Final State
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 2011 |
| Genre | : |
| ISBN | : |
We present a search for the pair production of first generation scalar leptoquarks (LQ) in data corresponding to an integrated luminosity of 5.4 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider in pp collisions at √s = 1.96 TeV. In the channel LQLQ → eq?eq, where q,q are u or d quarks, no significant excess of data over background is observed, and we set a 95% C.L. lower limit of 326 GeV on the leptoquark mass, assuming equal probabilities of leptoquark decays to eq and ?subesubq.
Search for First Generation Leptoquarks in Proton-antiproton Collisions at the Center of Mass Energy
| Author | : |
| Publisher | : |
| Total Pages | : 189 |
| Release | : 2004 |
| Genre | : |
| ISBN | : |
We describe a search for first generation leptoquarks decaying into the eejj final state in $p\bar{p}$ collisions at a center of mass energy of 1.96 TeV using the D0 detector at the Fermilab Tevatron. this search is based on data collected during 2002-2003 with an integrated luminosity of (130.4 =- 8.5) pb -1. Leptoquarks are assumed to be produced in pairs and to decay into an electron and a quark with a branching ration ?. We observe no evidence for leptoquarks, and set an upper cross section limit of 0.086 pb at the 95% confidence level corresponding to a lower mass limit of 231 GeV/c2 for scalar leptoquarks when ? = 1.
Search for First-generation Scalar Leptoquarks in P Anti-p Collisions at S**(1/2)
| Author | : |
| Publisher | : |
| Total Pages | : 8 |
| Release | : 2005 |
| Genre | : |
| ISBN | : |
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 1st Generation Leptoquarks in the Eejj Channel with the DZero Experiment
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 2008 |
| Genre | : |
| ISBN | : |
An evidence of the existence of leptoquarks (LQ) would prove the validity of various extensions of the Standard Model of Particle Physics (SM). The search for first generation leptoquarks presented in this dissertation has been performed by analyzing a 1.02 fb−1 sample of data collected by the D0 detector, events with a final state comprising two light jets and two electrons. The absence of an excess of events in comparison to SM expectations leads to exclude scalar LQ masses up to 292 GeV and vector LQ masses from 350 to 458 GeV, depending on the LQ-l-q coupling type. The great importance of a good jet energy measurement motivated the study of the instrumental backgrounds correlated to the calorimeter, as much as studies of the hadronic showers energy resolution in [gamma] + jets events.
