Search for Flavor-changing Neutral Current Top Quark Decays T - Hq, with H - Bb, in Pp Collisions at [square Root Of] 2

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ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.:/5 (112 download)

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Book Synopsis Search for Flavor-changing Neutral Current Top Quark Decays T - Hq, with H - Bb, in Pp Collisions at [square Root Of] 2 by : Shota Tsiskaridze

Download or read book Search for Flavor-changing Neutral Current Top Quark Decays T - Hq, with H - Bb, in Pp Collisions at [square Root Of] 2 written by Shota Tsiskaridze and published by . This book was released on 2015 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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

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Publisher : Springer
ISBN 13 : 3319634143
Total Pages : 248 pages
Book Rating : 4.3/5 (196 download)

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Book Synopsis 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 by : Shota Tsiskaridze

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.

Search for Flavor Changing Neutral Current Decays of the Top Quark in P {anti P} Collisions at (square Root) S

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (683 download)

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Book Synopsis Search for Flavor Changing Neutral Current Decays of the Top Quark in P {anti P} Collisions at (square Root) S by :

Download or read book Search for Flavor Changing Neutral Current Decays of the Top Quark in P {anti P} Collisions at (square Root) S written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Search for Flavor-changing Neutral Currents in Top-quark Decays T to Zq in Pp Collisions at Sqrt(s)

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ISBN 13 :
Total Pages : 25 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Search for Flavor-changing Neutral Currents in Top-quark Decays T to Zq in Pp Collisions at Sqrt(s) by :

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:

A Search for Flavour Changing Neutral Currents in Top-quark Decays in Pp Collision Data Collected with the ATLAS Detector at √s

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ISBN 13 :
Total Pages : 39 pages
Book Rating : 4.:/5 (925 download)

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Book Synopsis A Search for Flavour Changing Neutral Currents in Top-quark Decays in Pp Collision Data Collected with the ATLAS Detector at √s by :

Download or read book A Search for Flavour Changing Neutral Currents in Top-quark Decays in Pp Collision Data Collected with the ATLAS Detector at √s written by and published by . This book was released on 2014 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of √s = 7 TeV during 2011, corresponding to an integrated luminosity of 2.1 fb−1, were used. A search was performed for top-quark pair-production events, with one top quark decaying through the t → Zq FCNC (q = u, c) channel, and the other through the Standard Model dominant mode t → Wb. Only the decays of the Z boson to charged leptons and leptonic W-boson decays were considered as signal. Consequently, the final-state topology is characterised by the presence of three isolated charged leptons, at least two jets and missing transverse momentum from the undetected neutrino. No evidence for an FCNC signal was found. An upper limit on the t → Zq branching ratio of BR(t → Zq)

Oechslin Oscar (?-?).

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (61 download)

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Book Synopsis Oechslin Oscar (?-?). by :

Download or read book Oechslin Oscar (?-?). written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Zeitungsausschnitte.

Search for Top Decays Through Flavor Changing Neutral Current Process, T --> Z+q, in Pp Collisions at [square Root]s

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ISBN 13 :
Total Pages : pages
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Book Synopsis Search for Top Decays Through Flavor Changing Neutral Current Process, T --> Z+q, in Pp Collisions at [square Root]s by : 李昀翰

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:

Search for the Flavor Changing Neutral Current Decay T $\to Zq$ in $p \bar{p}$ Collisions at $\sqrt{s}

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis Search for the Flavor Changing Neutral Current Decay T $\to Zq$ in $p \bar{p}$ Collisions at $\sqrt{s} by :

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)

A Search for Flavour Changing Neutral Currents in Top-quark Decays in Pp Collision Data Collected with the ATLAS Detector at {u221A}s

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ISBN 13 :
Total Pages : 39 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis A Search for Flavour Changing Neutral Currents in Top-quark Decays in Pp Collision Data Collected with the ATLAS Detector at {u221A}s by :

Download or read book A Search for Flavour Changing Neutral Currents in Top-quark Decays in Pp Collision Data Collected with the ATLAS Detector at {u221A}s written by and published by . This book was released on 2012 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of √s = 7 TeV during 2011, corresponding to an integrated luminosity of 2.1 fb−1, were used. A search was performed for top-quark pair-production events, with one top quark decaying through the t → Zq FCNC (q = u, c) channel, and the other through the Standard Model dominant mode t → Wb. Only the decays of the Z boson to charged leptons and leptonic W-boson decays were considered as signal. Consequently, the final-state topology is characterised by the presence of three isolated charged leptons, at least two jets and missing transverse momentum from the undetected neutrino. No evidence for an FCNC signal was found. An upper limit on the t → Zq branching ratio of BR(t → Zq)

Search for the Flavor Changing Neutral Current Decay $t\rightarrow QZ$ in $p\overline{p}$ Collisions at $\sqrt{s}$

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (982 download)

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Book Synopsis Search for the Flavor Changing Neutral Current Decay $t\rightarrow QZ$ in $p\overline{p}$ Collisions at $\sqrt{s}$ by :

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%.

A Search for Flavor Changing Neutral Current Decays of the Top Quark in Pp Collisions at /s

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Publisher :
ISBN 13 :
Total Pages : 117 pages
Book Rating : 4.:/5 (345 download)

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Book Synopsis A Search for Flavor Changing Neutral Current Decays of the Top Quark in Pp Collisions at /s by : Robin Lovelace Coxe

Download or read book A Search for Flavor Changing Neutral Current Decays of the Top Quark in Pp Collisions at /s written by Robin Lovelace Coxe and published by . This book was released on 1995 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Search for Flavor Changing Neutral Currents in Top Quark Decays Using a Two-leptons+track Selection

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (932 download)

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Book Synopsis Search for Flavor Changing Neutral Currents in Top Quark Decays Using a Two-leptons+track Selection by :

Download or read book Search for Flavor Changing Neutral Currents in Top Quark Decays Using a Two-leptons+track Selection written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Search for the Flavor Changing Neutral Current Decay T --> Zq at [the Square Root Of] S

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ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.:/5 (311 download)

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Book Synopsis Search for the Flavor Changing Neutral Current Decay T --> Zq at [the Square Root Of] S by : Jennifer Lindsay Gimmell

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:

Search for the Flavor Changing Neutral Current Decay T --] Z Q at Sqrt(s)

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ISBN 13 :
Total Pages : 151 pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis Search for the Flavor Changing Neutral Current Decay T --] Z Q at Sqrt(s) by :

Download or read book Search for the Flavor Changing Neutral Current Decay T --] Z Q at Sqrt(s) written by and published by . This book was released on 2009 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports the results of a search for the flavor changing neutral current decay of the top quark, t → Zq, in decays of t{bar t} pairs produced in p{bar p} collisions at a center-of-mass energy of 1.96 TeV. This search is performed on a data sample recorded by the Collider Detector at Fermilab (CDF), corresponding to an integrated luminosity of 1.9 fb−1. This search follows a previous CDF analysis that resulted in an upper limit for the branching fraction [Beta](t → Zq) of 10.4% at 95% C.L. using a dataset equivalent to 1.1 fb−1 of integrated luminosity. This thesis extends to 1.9 fb−1 of data, and has improved sensitivity to the small signal with the introduction of a template fit technique that includes systematic uncertainties by a linear interpolation between templates. Using a Feldman-Cousins construction, an upper limit at 95% C.L. is set on [Beta](t → Zq) of 3.7%, with the expected upper limit in absence of a signal is 5.0 ± 2.2% for a top mass of 175 GeV/c2.

Search for Top Quark Decays Via Higgs-boson-mediated Flavor-changing Neutral Currents in Pp Collisions at √s

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (119 download)

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Book Synopsis Search for Top Quark Decays Via Higgs-boson-mediated Flavor-changing Neutral Currents in Pp Collisions at √s by :

Download or read book Search for Top Quark Decays Via Higgs-boson-mediated Flavor-changing Neutral Currents in Pp Collisions at √s written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Search for the Flavor Changing Neutral Current Decay T → QZ in Pp Collisions at √s

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ISBN 13 :
Total Pages : 550 pages
Book Rating : 4.:/5 (961 download)

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Book Synopsis Search for the Flavor Changing Neutral Current Decay T → QZ in Pp Collisions at √s by : Ingyin Zaw

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:

A Limit on the Branching Ratio of the Flavor-Changing Top Quark Decay T--]Zc

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ISBN 13 :
Total Pages : 119 pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis A Limit on the Branching Ratio of the Flavor-Changing Top Quark Decay T--]Zc by :

Download or read book A Limit on the Branching Ratio of the Flavor-Changing Top Quark Decay T--]Zc written by and published by . This book was released on 2009 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have used the Collider Detector at Fermilab (CDF-II) to set upper limits on the branching ratio of the flavor-changing neutral-current (FCNC) top quark decay t 2!Zc using a technique employing ratios of W and Z production, measured in 1.52 fb−1 of p{bar p} data. The analysis uses a comparison of two decay chains, p{bar p} 2!t{bar t} 2!WbWb 2!l[nu]bjjb and p{bar p} 2!t{bar t} ZcWb 2!ll− cjjb, to cancel systematic uncertainties in acceptance, efficiency, and luminosity. We validate the MC modeling of acceptance and efficiency for lepton identification over the multi-year dataset also using a ratio of W and Z production, in this case the observed ratio of inclusive production of W to Z-bosons, a technique that will be essential for precision comparisons with the standard model at the LHC. We introduce several methods of determining backgrounds to the W and Z samples. To improve the discrimination against SM backgrounds to top quark decays, we calculate the top mass for each event with two leptons and four jets assuming it is a t{bar t} event with one of the top quarks decaying to Zc. The upper limit on the Br(t 2!Zc) is estimated from a likelihood constructed with the ll− cjjb top mass distribution and the number of l[nu]bjjb events. Limits are set as a function of the helicity of the Z-boson produced in the FCNC decay. For 100%-longitudinally-polarized Z-bosons we find a limit of 8.3% (95% C.L.).