Search For Anomalous Production Of Photon Jets Missing Transverse Energy In P Bar P Collisions At Sqrt S
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Search For Anomalous Production Of Photon Jets Missing Transverse Energy In P Bar P Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2011
Search For Anomalous Production Of Photon Jets Missing Transverse Energy In P Bar P 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 model-independent signature-based search for physics beyond the Standard Model is performed in the photon~+ jets~+ missing transverse energy channel in \ppbar collisions at a center of mass energy of 1.96 TeV using the CDF II detector. Events with a photon + jets are predicted by the Standard Model and also by many theoretical models beyond the Standard Model. In the Standard Model, the main mechanisms for photon~+ jets production include quark-antiquark annihilation and quark-gluon scattering. No intrinsic missing transverse energy is present in any of these Standard Model processes. In this search, photon~+ $\geq$1 jet and photon~+ $\geq$2 jet events are analyzed with and without a minimum requirement on the missing transverse energy. Numerous mass distributions and kinematic distributions are studied and no significant excess over the background prediction is found. All results indicate good agreement with expectations of the Standard Model.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Search For Events With Leptonic Jets And Missing Transverse Energy In Mathbf P Bar P Collisions At Mathbf Sqrt S
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Author :
language : en
Publisher:
Release Date : 2010
Search For Events With Leptonic Jets And Missing Transverse Energy In Mathbf P Bar P Collisions At Mathbf 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.
We present the first search for pair production of isolated jets of charged leptons in association with a large imbalance in transverse energy in p{bar p} collisions using 5.8 fb−1 of integrated luminosity collected by the D0 detector at the Fermilab Tevatron Collider. No excess is observed above Standard Model background, and the result is used to set upper limits on the production cross section of pairs of supersymmetric chargino and neutralino particles as a function of 'dark-photon' mass, where the dark photon is produced in the decay of the lightest supersymmetric particle.
Study Of P Bar P Collisions That Contain Leptons A Photon And A B Quark Using The Cdf Ii Detector
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Author :
language : en
Publisher:
Release Date : 2011
Study Of P Bar P Collisions That Contain Leptons A Photon And A B Quark Using The Cdf Ii 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 2011 with categories.
We present a search for anomalous production of the signature lepton + photon + b-quark + missing transverse energy (`[gamma]6ETb) produced in $p\bar{p}$ collisions at √ s = 1.96 TeV using 6.0 fb-1 of data taken with the CDF detector in Run II at the Tevatron. In addition to this signature-based search, we present a closely-related search for top pair production with an additional radiated photon, t$\bar{t}$[gamma]. We find 85 `[gamma]6ETb events versus an expectation of 99.1±9.3 events. High-statistics control samples are used to evaluate a low-energy photon [chi] 2 cut. Additionally requiring the events to contain at least three jets, have a total transverse energy of 200 GeV, and that the photon candidate passes the [chi] 2 cut, we observe 30 t$\bar{t}$[gamma] candidate events versus an expectation from non-top Standard Model (SM) sources of 13.0 ± 2.1 Assuming the difference between the observed number and the predicted non-top SM total is due to top production, we measure the tt$\bar{[gamma]}$ cross section to be 0.18 ± 0.08 pb. We also measure the ratio of the t$\bar{t}$[gamma] cross section to the t$\bar{t}$cross section to be 0.024 ± 0.009, which compares well with a SM prediction of 0.024 ± 0.013.
Search For Anomalous Production Of Photon Jets Missing Transverse Energy In Proton Antiproton Collisions At A Center Of Mass Energy Of 1 96 Tev Using The Cdf Ii Detector
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Author : Samantha K. Hewamanage
language : en
Publisher:
Release Date : 2011
Search For Anomalous Production Of Photon Jets Missing Transverse Energy In Proton Antiproton Collisions At A Center Of Mass Energy Of 1 96 Tev Using The Cdf Ii Detector written by Samantha K. Hewamanage 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 model-independent signature-based search for physics beyond the Standard Model is performed in the photon + jets + missing transverse energy channel in proton-antiproton collisions at a center of mass energy of 1.96 TeV using the CDF II detector. Events with a photon + jets are predicted by the Standard Model and also by many theoretical models beyond the Standard Model. In the Standard Model, the main mechanisms for photon + jets production include quark-antiquark annihilation and quark-gluon scattering. No intrinsic missing transverse energy is present in any of these Standard Model processes. In this search, photon + [greater-than or equal to] 1 jet and photon + [greater-than or equal to] 2 jet events are analyzed with and without a minimum requirement on the missing transverse energy. Numerous mass distributions and kinematic distributions are studied and no significant excess over the background prediction is found. All results indicate good agreement with expectations of the Standard Model.
Search For Large Extra Dimensions In Final States Containing One Photon Or Jet And Large Missing Transverse Energy Produced In P Anti P Collisions At S
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Author :
language : en
Publisher:
Release Date : 2008
Search For Large Extra Dimensions In Final States Containing One Photon Or Jet And Large Missing Transverse Energy Produced 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 2008 with categories.
The authors present the results of searches for large extra dimensions in samples of events with large missing transverse energy E{sub T} and either a photon or a jet produced in p{bar p} collisions at √s = 1.96 TeV collected with the CDF II detector. For? + E{sub T} and jet + E{sub T} candidate samples corresponding to 2.0 fb−1 and 1.1 fb−1 of integrated luminosity respectively, they observe good agreement with standard model expectations and obtain a combined lower limit on the fundamental parameter of the large extra dimensions model, M{sub D}, as a function of the number of extra dimensions in the model.
A Search For New Physics In Photon Lepton Events In Proton Antiproton Collisions At Radical S
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Author :
language : en
Publisher:
Release Date : 2003
A Search For New Physics In Photon Lepton Events In Proton Antiproton Collisions At Radical 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 2003 with categories.
We present the results of a search in p[bar p] collisions at[radical]s= 1.8 TeV for anomalous production of events containing a photon with large transverse energy and a lepton (e or[mu]) with large transverse energy, using 86 pb[sup -1] of data collected at the Collider Detector at Fermilab during the 1994-95 collider run at the Fermilab Tevatron. The presence of large missing transverse energy (E[sub T]), additional photons, or additional leptons in these events is also analyzed. The results are consistent with standard model expectations, with the possible exception of photon-lepton events with large E[sub T], for which the probability of a statistical fluctuation of the standard model expectation up to and above the observed level is 0.7%.
Search For Large Extra Dimensions In Final States Containing One Photon Or Jet And Large Missing Transverse Energy Produced In P Anti P Collisions At S 1 2
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Author :
language : en
Publisher:
Release Date : 2008
Search For Large Extra Dimensions In Final States Containing One Photon Or Jet And Large Missing Transverse Energy Produced 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 2008 with categories.
The authors present the results of searches for large extra dimensions in samples of events with large missing transverse energy E{sub T} and either a photon or a jet produced in p{bar p} collisions at √s = 1.96 TeV collected with the CDF II detector. For [gamma] + E{sub T} and jet + E{sub T} candidate samples corresponding to 2.0 fb−1 and 1.1 fb−1 of integrated luminosity respectively, they observe good agreement with standard model expectations and obtain a combined lower limit on the fundamental parameter of the large extra dimensions model, M{sub D}, as a function of the number of extra dimensions in the model.
Search For Large Extra Dimensions In The Production Of Jets And Missing Transverse Energy In Ppbar Collisions At S 1 2
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Author :
language : en
Publisher:
Release Date : 2006
Search For Large Extra Dimensions In The Production Of Jets And Missing Transverse Energy In Ppbar 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.
The authors present the results of a search for new physics in the jets plus missing transverse energy data sample collected from 368 pb−1 of p{bar p} collisions at √s = 1.96 TeV recorded by the Collider Detector at Fermilab. They compare the number of events observed in the data with a data-based estimate of the standard model backgrounds contributing to this signature. They observe no significant excess of events, and they interpret this null result in terms of lower limits on the fundamental Planck scale for a large extra dimensions scenario.
Search For Large Extra Dimensions In The Production Of Jets And Missing Transverse Energy In Ppbar Collisions At S
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Author :
language : en
Publisher:
Release Date : 2006
Search For Large Extra Dimensions In The Production Of Jets And Missing Transverse Energy In Ppbar 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.
The authors present the results of a search for new physics in the jets plus missing transverse energy data sample collected from 368 pb−1 of p{bar p} collisions at √s = 1.96 TeV recorded by the Collider Detector at Fermilab. They compare the number of events observed in the data with a data-based estimate of the standard model backgrounds contributing to this signature. They observe no significant excess of events, and they interpret this null result in terms of lower limits on the fundamental Planck scale for a large extra dimensions scenario.