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Author : Ingyin Zaw
Publisher :
ISBN 13 :
Total Pages : 550 pages
Book Rating : 4.:/5 (961 download)
Download or read book Search for the Flavor Changing Neutral Current Decay T → QZ in Pp Collisions at √s written by Ingyin Zaw and published by . This book was released on 2007 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the Flavor Changing Neutral Current Decay $t\rightarrow QZ$ in $p\overline{p}$ Collisions at $\sqrt{s}$ written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents a blind search for the flavor changing neutral current decay of the top quark t → qZ in pp collisions at [special characters omitted] = 1.96TeV using a data sample corresponding to an integrated luminosity of 1.12 fb-1 collected by the Collider Detector at Fermilab (CDF), This decay is extremely rare in the standard model, and a signal at the Tevatron would be an indication of new physics. Dividing candidate events with a Z boson and four or more jets into a sample of those which have a heavy flavor jet identified by a secondary vertex algorithm and those which do not, we observe data yields consistent with background expectations. We set a 95% C.L. upper limit on the branching fraction B (t → qZ) of 11.3%, consistent with an expected upper limit of 7.8% ± 3.3%.
Author :
Publisher :
ISBN 13 :
Total Pages : 25 pages
Book Rating : 4.:/5 (16 download)
Download or read book Search for Flavor-changing Neutral Currents in Top-quark Decays T to Zq in Pp Collisions at Sqrt(s) written by and published by . This book was released on 2013 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for the Flavor Changing Neutral Current Decay T $\to Zq$ in $p \bar{p}$ Collisions at $\sqrt{s} written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a search for the flavor changing neutral current (FCNC) decay of the top quark t → Zq (q = u, c) in p{bar p} collisions at √s = 1.96 TeV using a data sample corresponding to an integrated luminosity of 1.9 fb−1 collected by the CDF II detector. This decay is strongly suppressed in the standard model (SM) and a signal at the Tevatron would be an indication of physics beyond the SM. Using Z+ ≥ 4 jet final state candidate events, both with and without an identified bottom quark jet, we discriminate signal from background by exploring kinematic constraints present in FCNC events and obtain an upper limit of [Beta](t → Zq)
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Author : 李昀翰
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (892 download)
Download or read book Search for Top Decays Through Flavor Changing Neutral Current Process, T --> Z+q, in Pp Collisions at [square Root]s written by 李昀翰 and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shota Tsiskaridze
Publisher : Springer
ISBN 13 : 3319634143
Total Pages : 248 pages
Book Rating : 4.3/5 (196 download)
Download or read book Search for Flavor-Changing Neutral Current Top Quark Decays t → Hq, with H → bb̅ , in pp Collisions at √s = 8 TeV with the ATLAS Detector written by Shota Tsiskaridze and published by Springer. This book was released on 2017-08-02 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This PhD thesis focuses on the search for flavor-changing neutral currents in the decay of a top quark to an up-type quark (q = u, c) and the Standard Model Higgs boson, where the Higgs boson decays to bb. Further, the thesis presents the combination of this search for top quark pair events with other ATLAS searches – in the course of which the most restrictive bounds to date on tqH interactions were obtained. Following on from the discovery of the Higgs boson, it is particularly important to measure the Yukawa couplings of the Standard Model fermions; these parameters may provide crucial insights to help solve the flavor puzzle and may help reveal the presence of new physics before it is directly observed in experiments.
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Author : Jennifer Lindsay Gimmell
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.:/5 (311 download)
Download or read book Search for the Flavor Changing Neutral Current Decay T --> Zq at [the Square Root Of] S written by Jennifer Lindsay Gimmell and published by . This book was released on 2009 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Cline David B
Publisher : World Scientific
ISBN 13 : 9814545821
Total Pages : 396 pages
Book Rating : 4.8/5 (145 download)
Download or read book Flavor-changing Neutral Currents: Present And Future Studies: Proceedings Of The Symposium written by Cline David B and published by World Scientific. This book was released on 1997-11-29 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Partial differential equations form an essential part of the core mathematics syllabus for undergraduate scientists and engineers. The origins and applications of such equations occur in a variety of different fields, ranging from fluid dynamics, electromagnetism, heat conduction and diffusion, to quantum mechanics, wave propagation and general relativity.This volume introduces the important methods used in the solution of partial differential equations. Written primarily for second-year and final-year students taking physics and engineering courses, it will also be of value to mathematicians studying mathematical methods as part of their course. The text, which assumes only that the reader has followed a good basic first-year ancillary mathematics course, is self-contained and is an unabridged republication of the third edition published by Longman in 1985.
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (16 download)
Download or read book Updated Search for the Flavor-Changing Neutral-Current Decay $D0̂ \to \mu+̂ \mu-̂$ written by and published by . This book was released on 2010 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for the flavor-changing neutral-current decay D° →??− in p{bar p} collisions at √s = 1.96TeV using 360 pb−1 of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. A displaced vertex trigger selects long-lived D° candidates in the?+?−,?+?−, and K−?+ decay modes. We use the Cabibbo-favored D° → K−?+ channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D° →?+?− channel for normalization. We set an upper limit on the branching fraction?(D° →?+?−)
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Author : [Study Group] ATLAS Collaboration CERN
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)
Download or read book Search for Flavour-changing Neutral-current Interactions of a Top Quark and a Gluon 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:
Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (16 download)
Download or read book Search for the Flavor-changing Neutral Current Decay K Sup + Yields. Pi. Sup +. Nu. Nu written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The observation that flavor-changing neutral currents (FCNC) in weak decays are highly suppressed was first explained by Glashow, Iliopoulos and Maiani in 1970, and their idea has since become a cornerstone of the Standard Model. They proposed a model of the weak interaction that included a then new fourth quark and which, in a natural way, allowed the existence of a neutral vector boson without inducing FCNC's at tree level. Thus the couplings of the neutral intermediary{hor ellipsis}cause no embarrassment.'' In higher order through, decays like K →?l{bar l} can proceed. Measurements of such processes provide a detailed test of the Standard Model since definite predictions for their rates can be calculated. Conversely, if no contradictions are found and the standard model is assumed to describe the physics, measurements limit the allowed values of the parameters of the model. As is often the case in studying processes that are highly suppressed and heretofore unseen, improvements in the sensitivity of experiments allow the possibility for the discovery of new physics that exhibits a similar experimental signature. This paper describes experiment 787 at Brookhaven which is expected to address some of these issues. The status and future of the experiment will be described here. The main goal of E787 is to measure the rate of K →?+?{bar {nu}} at the standard model level. In addition, the experiment has sensitivity to other FCNC decays of the charged kaon, in particular the decays K+ →?+?+?− and K+ →?+??
Author :
Publisher :
ISBN 13 :
Total Pages : 289 pages
Book Rating : 4.:/5 (871 download)
Download or read book Heavy Flavor Decays of the Z0 and a Search for Flavor Changing Neutral Currents written by and published by . This book was released on 2004 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented here are the results of a direct search for flavor changing neutral currents via the rare process Z° → bs and a measurement of R{sub bs} = [Lambda](Z° → bs)/[Lambda](Z° → hadrons). Because the decays Z° → b{bar b} and Z° → c{bar c} contribute significant backgrounds to Z° → bs, simultaneous measurements of R{sub b} = [Lambda](Z° → b{bar b})/[Lambda](Z° → hadrons) and R{sub c} = [Lambda](Z° → c{bar c})/[Lambda](Z° → hadrons) were also made. The standard double tag technique was extended and self calibrating tags were used for s, c, and b quarks. These measurements were made possible by the unique capabilities of the SLAC Large Detector (SLD) at the Stanford Linear Accelerator Center (SLAC): The b and c tags relied upon the SLD's VXD3 307 megapixel CCD vertex detector for topological and kinematic reconstruction of the B and D decay vertices; the s tag identified K{sup {+-}} mesons using the particle identification capabilities of SLD's Cherenkov Ring Imaging Detector (CRID), and K{sub S}° mesons and [Lambda] hadrons by kinematic reconstruction of their decay vertices in SLD's 5120 channel central drift chamber (CDC) particle tracking system.
Download or read book Search for Flavor Changing Neutral Currents K written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for the flavor-changing neutral-current decays K/sub L/° .-->. .pi.°ee/sup /minus//, K/sub L/° .-->. ee/sup /minus// and K/sub L/° .-->. .mu./sup +-/e/sup /minus plus//. Limits obtained for these processes are BR(K/sub L/° .-->. .pi.°e+e/sup /minus//) 3.2 x 10/sup /minus/7/, BR(K/sub L/° .--. e+e/sup /minus//) 1.2 x 10/sup /minus/9/, BR(K/sub L/° .--. .mu./sup +-/e/sup /minus plus//)
Author : Nicholas James Witchey
Publisher :
ISBN 13 :
Total Pages : 326 pages
Book Rating : 4.:/5 (355 download)
Download or read book Search for Flavor Changing Neutral Current Decays of Charm Mesons written by Nicholas James Witchey and published by . This book was released on 1996 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 902 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Download or read book Search for Flavor-changing Neutral Current and Lepton-flavor Violating Decays of D[sup 0] --] [ell][sup +] [ell][sup -]. written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report on a search for the flavor-changing neutral current decays D[sup 0] --> e[sup +]e[sup -] and D[sup 0] --> [mu][sup +][mu][sup -], and the lepton-flavor violating decay D[sup 0] --> e[sup [+-]][mu][sup [-+]]. The measurement is based on 122 fb[sup -1] of data collected by the BABAR detector at the PEP-II asymmetric e[sup +]e[sup -] collider. No evidence is found for any of the decays. The upper limits on the branching fractions, at the 90% confidence level, are 1.2 x 10[sup -6] for D[sup 0] --> e[sup +]e[sup -], 1.3 x 10[sup -6] for D[sup 0] --> [mu][sup +][mu][sup -], and 8.1 x 10[sup -7] for D[sup 0] --> e[sup [+-]][mu][sup [-+]].
Download or read book A Search for Flavor Changing Neutral Currents and Lepton Family Number Violation in Neutral Two-body Charm Decays written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents a search for three rare/forbidden neutral charm decays, D[sup 0][yields][mu]e, D[sup 0][yields][mu][mu], and D[sup 0][yields] ee. This study was based on data collected in Experiment E789 at the Fermi National Accelerator Laboratory using 800 GeV/c proton-gold interactions. Two statistical analyses are presented, one with background subtraction and the other without background subtraction. No evidence is found for any of the decays and the following upper limits are presented at the 90% confidence level.
