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A Search For New Physics In Photon Lepton Events In Proton Antiproton Collisions At Square Root S
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Book Synopsis A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions at [square Root] S by : Jeffrey W. Berryhill
Download or read book A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions at [square Root] S written by Jeffrey W. Berryhill and published by . This book was released on 2000 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions At[radical] S by :
Download or read book A Search for New Physics in Photon-lepton Events in Proton-antiproton Collisions At[radical] S written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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%.
Book Synopsis Search for New Phenomena in Three- Or Four-lepton Events in Pp Collisions at [square Root]s by : [Study Group] ATLAS Collaboration CERN
Download or read book Search for New Phenomena in Three- Or Four-lepton Events in Pp Collisions at [square Root]s written by [Study Group] ATLAS Collaboration CERN and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: A search with minimal model dependence for physics beyond the Standard Model in events featuring three or four charged leptons (3l and 4l, ) is presented. The analysis aims to be sensitive to a wide range of potential new-physics theories simultaneously. This analysis uses data from pp collisions delivered by the Large Hadron Collider at a centre-of-mass energy of TeV and recorded with the ATLAS detector, corresponding to the full Run 2 dataset of 139 fb−1. The 3l and 4l phase space is divided into 22 event categories according to the number of leptons in the event, the missing transverse momentum, the invariant mass of the leptons, and the presence of leptons originating from a Z-boson candidate. These event categories are analysed independently for the presence of deviations from the Standard Model. No statistically significant deviations from the Standard Model predictions are observed. Upper limits for all signal regions are reported in terms of the visible cross-section
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-proton Collisions at Sqrt(s) by : David Michael Morse
Download or read book A Search for New Physics in Events with Two Photons and Missing Transverse Energy in Proton-proton Collisions at Sqrt(s) written by David Michael Morse and published by . This book was released on 2013 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for New Physics with High Mass Tau Pairs in Proton-antiproton Collisions at [square Root] S by : Zongru Wan
Download or read book A Search for New Physics with High Mass Tau Pairs in Proton-antiproton Collisions at [square Root] S written by Zongru Wan and published by . This book was released on 2005 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for New Physics in Lepton + Photon + X Events with 305 Pb**-1 of P Anti-p Collisions at S**ư by :
Download or read book Search for New Physics in Lepton + Photon + X Events with 305 Pb**-1 of P Anti-p Collisions at S**ư written by and published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present results of a search for anomalous production of events containing a charged lepton (l, either e or?) and a photon , both with high transverse momentum, accompanied by additional signatures, X, including missing transverse energy (E{sub T}) and additional leptons and photons. We use the same kinematic selection criteria as in a previous CDF search, but with a substantially larger data set, 305 pb−1, a p{bar p} collision energy of 1.96 TeV, and the upgraded CDF II detector. We find 42 l?E{sub T} events versus a standard model expectation of 37.3 ± 5.4 events. The level of excess observed in Run I, 16 events with an expectation of 7.6 ± 0.7 events (corresponding to a 2.7? effect), is not supported by the new data. In the signature of ll? + X we observe 31 events versus an expectation of 23.0 ± 2.7 events. In this sample we find no events with an extra photon or E{sub T} and so find no events like the one ee??E{sub T} event observed in Run I.
Book Synopsis Search for New Physics in Lepton + Photon + X Events with 929 Pb**-1 of P Anti-p Collisions at S**(1/2) by : A. Loginov
Download or read book Search for New Physics in Lepton + Photon + X Events with 929 Pb**-1 of P Anti-p Collisions at S**(1/2) written by A. Loginov and published by . This book was released on 2006 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present results of a search in 929 {+-} 56 pb{sup -1} of p{bar p} collisions at 1.96 TeV for the anomalous production of events containing a charged lepton ({ell}, either e or {mu}) and a photon ({gamma}), both with high transverse momentum, accompanied by additional signatures, X, including missing transverse energy (E{sub T}) and additional leptons and photons. They use the same selection criteria as in the previous CDF Run I search, but with an order-magnitude larger data set, a higher p{bar p} collision energy, and the CDF II detector.
Book Synopsis Search for New Physics in Lepton + Photon + X Events with 929 Pb**-1 of P Anti-p Collisions at S**ư by :
Download or read book Search for New Physics in Lepton + Photon + X Events with 929 Pb**-1 of P Anti-p Collisions at S**ư written by and published by . This book was released on 2006 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present results of a search in 929 ± 56 pb−1 of p{bar p} collisions at 1.96 TeV for the anomalous production of events containing a charged lepton (l, either e or?) and a photon , both with high transverse momentum, accompanied by additional signatures, X, including missing transverse energy (E{sub T}) and additional leptons and photons. They use the same selection criteria as in the previous CDF Run I search, but with an order-magnitude larger data set, a higher p{bar p} collision energy, and the CDF II detector.
Book Synopsis Search for New Physics in Lepton + Photon + X Events with 305 Pb**-1 of P Anti-p Collisions at S**1/2 by :
Download or read book Search for New Physics in Lepton + Photon + X Events with 305 Pb**-1 of P Anti-p Collisions at S**1/2 written by and published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present results of a search for anomalous production of events containing a charged lepton (l, either e or [mu]) and a photon ([gamma]), both with high transverse momentum, accompanied by additional signatures, X, including missing transverse energy (E{sub T}) and additional leptons and photons. We use the same kinematic selection criteria as in a previous CDF search, but with a substantially larger data set, 305 pb−1, a p{bar p} collision energy of 1.96 TeV, and the upgraded CDF II detector. We find 42 l[gamma]E{sub T} events versus a standard model expectation of 37.3 ± 5.4 events. The level of excess observed in Run I, 16 events with an expectation of 7.6 ± 0.7 events (corresponding to a 2.7[sigma] effect), is not supported by the new data. In the signature of ll[gamma] + X we observe 31 events versus an expectation of 23.0 ± 2.7 events. In this sample we find no events with an extra photon or E{sub T} and so find no events like the one ee[gamma][gamma]E{sub T} event observed in Run I.
Book Synopsis Photon Production from [proton Antiproton] Collisions at [square Root] S by : Thomas Gordon Carter
Download or read book Photon Production from [proton Antiproton] Collisions at [square Root] S written by Thomas Gordon Carter and published by . This book was released on 1990 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Anomalous Kinematics of Top Dilepton Events in Proton-antiproton Collisions at [square Root] S by : Andrew Gennadievich Ivanov
Download or read book Search for Anomalous Kinematics of Top Dilepton Events in Proton-antiproton Collisions at [square Root] S written by Andrew Gennadievich Ivanov and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for New Physics Processes with Same Charge Leptons in the Final State with the ATLAS Detector Using Proton-proton Collisions at [square Root] S by : Miha Muškinja
Download or read book Search for New Physics Processes with Same Charge Leptons in the Final State with the ATLAS Detector Using Proton-proton Collisions at [square Root] S written by Miha Muškinja and published by . This book was released on 2018 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Excited Leptons in Proton-proton Collisions at {u221A}(s) by :
Download or read book Search for Excited Leptons in Proton-proton Collisions at {u221A}(s) written by and published by . This book was released on 2016 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our search for compositeness of electrons and muons is presented using a data sample of proton-proton collisions at a center-of-mass energy of √(s) = 8 TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb-1. Excited leptons (l*) produced via contact interactions in conjunction with a standard model lepton are considered, and a search is made for their gauge decay modes. The decays considered are l* →l? and l* → lZ, which give final states of two leptons and a photon or, depending on the Z-boson decay mode, four leptons or two leptons and two jets. The number of events observed in data is consistent with the standard model prediction. Exclusion limits are set on the excited lepton mass, and the compositeness scale L. For the case Ml* = L the existence of excited electrons (muons) is excluded up to masses of 2.45 (2.47) TeV at 95% confidence level. The neutral current decays of excited leptons are considered for the first time, and limits are extended to include the possibility that the weight factors f and f ', which determine the couplings between standard model leptons and excited leptons via gauge mediated interactions, have opposite sign.
Book Synopsis Soft Photon Production from Proton-antiproton Collisions at [square Root] S by : Charles A. Loomis
Download or read book Soft Photon Production from Proton-antiproton Collisions at [square Root] S written by Charles A. Loomis and published by . This book was released on 1992 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proton-antiproton Collider Physics - 8th Topical Workshop by : G Belletini
Download or read book Proton-antiproton Collider Physics - 8th Topical Workshop written by G Belletini and published by World Scientific. This book was released on 1990-07-19 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings presents in a systematic way Top searches, Jets, Gauge Boson production, precision tests of electroweak theory, Ln s Physics, heavy Flavours and exotics. In addition, contributions to the sessions 'News from the World', 'Short term future' and 'Long term future' show the progress of SSC in USA, of LHC at CERN, UNK/VLEPP in USSR together with Perspectives of Hadron Collider Physics.
Book Synopsis Search for Displaced Leptons in Proton-proton Collisions at [sqare Root]s by : Bryan Cardwell
Download or read book Search for Displaced Leptons in Proton-proton Collisions at [sqare Root]s written by Bryan Cardwell and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search is presented for new long-lived particles that propagate a measurable distance through the CMS detector before decaying to leptons. The search is performed in 113–118 fb-1 of proton-proton collision data produced by the CERN LHC at a center-of-mass energy of 13 TeV and collected by the CMS detector in 2016, 2017, and 2018. Events are selected with two leptons (an electron and a muon, two electrons, or two muons) that both have transverse impact parameter values between 0.01 and 10 cm. Using transverse impact parameter as the discriminating variable allows for sensitivity to displaced decays without requiring that the leptons form a common vertex. The search is designed to be sensitive to a wide range of new physics models that produce displaced di-lepton final states. The observation is consistent with the background-only hypothesis, and limits are set on the product of the cross-section of top squark pair production and the branching fraction to a lepton and a b or d quark through an R-parity-violating vertex. For a proper decay length hypothesis of 2 cm, top squarks with masses up 1500 GeV are excluded at the 95% confidence level.
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