Search For Pair Production Of Scalar Top Quarks In Jets And Missing Transverse Energy Channel With The D0 Detector

DOWNLOAD

Download Search For Pair Production Of Scalar Top Quarks In Jets And Missing Transverse Energy Channel With The D0 Detector PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Search For Pair Production Of Scalar Top Quarks In Jets And Missing Transverse Energy Channel With The D0 Detector book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Search For Pair Production Of Scalar Top Quarks In Jets And Missing Transverse Energy Channel With The D0 Detector

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2008

Search For Pair Production Of Scalar Top Quarks In Jets And Missing Transverse Energy Channel With The D0 Detector 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.

This dissertation describes a search for the pair production of scalar top quarks, {tilde t}1, using a luminosity of 995 pb−1 of data collected in p{bar p} collisions with the D0 detector at the Fermilab Tevatron Collider at a center-of-mass energy (square root)s = 1.96 TeV. Both scalar top quarks are assumed to decay into a charm quark and a neutralino, {tilde {chi}}1°, where {tilde {chi}}1° is the lightest supersymmetric particle. This leads to a final state with two acoplanar charm jets and missing transverse energy. The yield of such events in data is found to be consistent with the expectations from known standard model processes. Sets of {tilde t}1 and {tilde {chi}}1° masses are excluded at the 95% confidence level that substantially extend the domain excluded by previous searches. With the theoretical uncertainty on the {tilde t}1 pair production cross section taken into account, the largest limit for m{sub {tilde t}1} is m{sub {tilde t}1}> 150 GeV, for m{sub {tilde {chi}}1°} = 65 GeV.

Search For Pair Production Of Scalar Top Quarks In Jets And Missing Transverse Energy Channel With The D0 Detector

DOWNLOAD
Author : Mansoora Shamim
language : en
Publisher:
Release Date : 2008

Search For Pair Production Of Scalar Top Quarks In Jets And Missing Transverse Energy Channel With The D0 Detector written by Mansoora Shamim 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.

This dissertation describes a search for the pair production of scalar top quarks, tilde[subscript] 1, using a luminosity of 995 pb[superscript-1] of data collected in p[bar over]p collisions with the D0 detector at the Fermilab Tevatron Collider at a center-of-mass energy sqrt[s] = 1.96 TeV. Both scalar top quarks are assumed to decay into a charm quark and a neutralino, [tilde chi superscript 0 subscript 1] where [(tilde chi superscript 0 subscript 1)] is the lightest supersymmetric particle. This leads to a final state with two acoplanar charm jets and missing transverse energy. The yield of such events in data is found to be consistent with the expectations from known standard model processes. Sets of tilde [subscript 1] and tilde chi [superscript 0 subscript 1] masses are excluded at the 95% confidence level that substantially extend the domain excluded by previous searches. With the theoretical uncertainty on the pair production cross section taken into account, the largest limit for m[subscript tilde subscript 1] is m[subscript tilde chi subscript 1> 150 GeV, for m [subscript tilde chi negative 0 subscript 1]= 65 GeV.

Chemical Abstracts

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2002

Chemical Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Chemistry categories.

Search For The Pair Production Of Scalar Top Quarks In The Acoplanar Charm Jet Final State In P Anti P Collisions At S

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2006

Search For The Pair Production Of Scalar Top Quarks In The Acoplanar Charm Jet Final State In P Anti P Collisions At 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 2006 with categories.

A search for the pair production of scalar top quarks, {bar t}, has been performed in 360 pb−1 of data from p{bar p} collisions at a center-of-mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron collider. The {bar t} decay mode considered is {bar t} → c{bar {chi}}1°, where {bar {chi}}1° is the lightest supersymmetric particle. The topology analyzed therefore consists of a pair of acoplanar heavy-flavor jets with missing transverse energy. The data show good agreement with the standard model expectation, and a 95% C.L. exclusion domain in the (m{sub {tilde t}}, m{sub {tilde {chi}}1°}) plane has been determined, extending the domain excluded by previous experiments.

Search For The Pair Production Of Scalar Top Quarks In The Acoplanar Charm Jet Final State In P Anti P Collisions At S 1 2

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2006

Search For The Pair Production Of Scalar Top Quarks In The Acoplanar Charm Jet Final State 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 2006 with categories.

A search for the pair production of scalar top quarks, {bar t}, has been performed in 360 pb−1 of data from p{bar p} collisions at a center-of-mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron collider. The {bar t} decay mode considered is {bar t} → c{bar {chi}}1°, where {bar {chi}}1° is the lightest supersymmetric particle. The topology analyzed therefore consists of a pair of acoplanar heavy-flavor jets with missing transverse energy. The data show good agreement with the standard model expectation, and a 95% C.L. exclusion domain in the (m{sub {tilde t}}, m{sub {tilde {chi}}1°}) plane has been determined, extending the domain excluded by previous experiments.

Search For Direct Pair Production Of Scalar Top Quarks In The Single And Dilepton Channels In Proton Proton Collisions At Sqrt S

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2016

Search For Direct Pair Production Of Scalar Top Quarks In The Single And Dilepton Channels 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 2016 with categories.

Results are reported from a search for the top squark $ \tilde{t}_1 $, the lighter of the two supersymmetric partners of the top quark. The data sample corresponds to 19.7 fb$^{-1}$ of proton-proton collisions at $\sqrt{s} =$ 8 TeV collected with the CMS detector at the LHC. The search targets $ \tilde{t}_1 \to \mathrm{b} \tilde{\chi}^{\pm}_1$ and $ \tilde{t}_1 \to \mathrm{t}^{(*)} \tilde{\chi}^0_1$ decay modes, where $\tilde{\chi}^{\pm}_1$ and $\tilde{\chi}^0_1$ are the lightest chargino and neutralino, respectively. The reconstructed final state consists of jets, b jets, missing transverse energy, and either one or two leptons. Leading backgrounds are determined from data. No significant excess in data is observed above the expectation from standard model processes. The results exclude a region of the two-dimensional plane of possible $ \tilde{t}_1 $ and $\tilde{\chi}^0_1 $ masses. The highest excluded $ \tilde{t}_1 $ and $ \tilde{\chi}^0_1$ masses are about 700 GeV and 250 GeV, respectively.

Search For Admixture Of Scalar Top Quarks In The T Anti T Lepton Jets Final State At S

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2009

Search For Admixture Of Scalar Top Quarks In The T Anti T Lepton Jets Final State At 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 2009 with categories.

A search for pair production of the lightest supersymmetric partner of the top quark, {tilde t}1, is performed in the lepton+jets channel using 0.9 fb−1 of data collected by the D0 experiment. Kinematic differences between {tilde t}1{bar {tilde t}}1 and the dominant top quark pair production background are used to separate the two processes. First limits from Run II of the Fermilab Tevatron Collider for the scalar top quark decaying to a chargino and a b quark ({tilde t}1 → {tilde {chi}}1 b) are obtained for scalar top quark masses of 130-190 GeV and chargino masses of 90-150 GeV.

Search For Admixture Of Scalar Top Quarks In The T Anti T Lepton Jets Final State At S 1 2

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2009

Search For Admixture Of Scalar Top Quarks In The T Anti T Lepton Jets Final State 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 2009 with categories.

A search for pair production of the lightest supersymmetric partner of the top quark, {tilde t}1, is performed in the lepton+jets channel using 0.9 fb−1 of data collected by the D0 experiment. Kinematic differences between {tilde t}1{bar {tilde t}}1 and the dominant top quark pair production background are used to separate the two processes. First limits from Run II of the Fermilab Tevatron Collider for the scalar top quark decaying to a chargino and a b quark ({tilde t}1 2!{tilde {chi}}1 b) are obtained for scalar top quark masses of 130-190 GeV and chargino masses of 90-150 GeV.

Search For Electroweak Top Quark Production In The Electron Jets Channel In The D0 Experiment At The Tevatron

DOWNLOAD
Author : Emmanuel Busato
language : en
Publisher:
Release Date : 2005

Search For Electroweak Top Quark Production In The Electron Jets Channel In The D0 Experiment At The Tevatron written by Emmanuel Busato 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.

Search For Pair Production Of Scalar Top Quarks Decaying To A Lepton And A B Quark In 1 96 Tev P Bar P Collisions

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2008

Search For Pair Production Of Scalar Top Quarks Decaying To A Lepton And A B Quark In 1 96 Tev P Bar P Collisions 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.

I present the results of a search for pair production of scalar top quarks ($ ilde{t}$1) in an R-parity violating supersymmetric scenario using 322 pb-1 of p{bar p} collisions at √s = 1.96 TeV collected by the upgraded Collider Detector at Fermilab. I assume each $ ilde{t}$1 decays into a ? lepton and a b quark, with branching ratio ?, and search for final states containing either an electron or a muon from a leptonic ? decay, a hadronically decaying ? lepton, and two or more jets. Two candidate events pass my final selection criteria, consistent with the expectation from standard model processes. I present upper limits on the cross section times branching ratio squared ?($ ilde{t}$1$ ilde{t}$1) x ?2 as a function of the stop mass m($ ilde{t}$1). Assuming ? = 1, I set a 95% confidence level limit m($ ilde{t}$1) > 153 GeV=c2. These limits are also fully applicable to the case of a pair produced third generation scalar leptoquark that decays into a ? lepton and a b quark.