Author: Philip Michael Perea
Publisher:
ISBN:
Category :
Languages : en
Pages : 225
Book Description
I have performed a search for t-channel single top quark production in p{bar p} collisions at 1.96 TeV on a 366 pb{sup -1} dataset collected with the D0 detector from 2002-2005. The analysis is restricted to the leptonic decay of the W boson from the top quark to an electron or muon, tq{bar b} {yields} lv{sub l}b q{bar b} (l = e, {mu}). A powerful b-quark tagging algorithm derived from neural networks is used to identify b jets and significantly reduce background. I further use neural networks to discriminate signal from background, and apply a binned likelihood calculation to the neural network output distributions to derive the final limits. No direct observation of single top quark production has been made, and I report expected/measured 95% confidence level limits of 3.5/8.0 pb.
Search for T-Channel Single Top Quark Production in P Anti-p Collisions at 1.96 TeV.
Author: Philip Michael Perea
Publisher:
ISBN:
Category :
Languages : en
Pages : 225
Book Description
I have performed a search for t-channel single top quark production in p{bar p} collisions at 1.96 TeV on a 366 pb{sup -1} dataset collected with the D0 detector from 2002-2005. The analysis is restricted to the leptonic decay of the W boson from the top quark to an electron or muon, tq{bar b} {yields} lv{sub l}b q{bar b} (l = e, {mu}). A powerful b-quark tagging algorithm derived from neural networks is used to identify b jets and significantly reduce background. I further use neural networks to discriminate signal from background, and apply a binned likelihood calculation to the neural network output distributions to derive the final limits. No direct observation of single top quark production has been made, and I report expected/measured 95% confidence level limits of 3.5/8.0 pb.
Publisher:
ISBN:
Category :
Languages : en
Pages : 225
Book Description
I have performed a search for t-channel single top quark production in p{bar p} collisions at 1.96 TeV on a 366 pb{sup -1} dataset collected with the D0 detector from 2002-2005. The analysis is restricted to the leptonic decay of the W boson from the top quark to an electron or muon, tq{bar b} {yields} lv{sub l}b q{bar b} (l = e, {mu}). A powerful b-quark tagging algorithm derived from neural networks is used to identify b jets and significantly reduce background. I further use neural networks to discriminate signal from background, and apply a binned likelihood calculation to the neural network output distributions to derive the final limits. No direct observation of single top quark production has been made, and I report expected/measured 95% confidence level limits of 3.5/8.0 pb.
Search for T-Channel Single Top Quark Production in P$\bar{p}$ Collisions at 1.96 TeV.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 225
Book Description
I have performed a search for t-channel single top quark production in p$ar{p}$ single number sub collisions at 1.96 TeV on a 366 pb-1 dataset collected with the D0 detector from 2002-2005. The analysis is restricted to the leptonic decay of the W boson from the top quark to an electron or muon, tq$ar{b}$ → lvlb q$ar{b}$ (l = e,?). A powerful b-quark tagging algorithm derived from neural networks is used to identify b jets and significantly reduce background. I further use neural networks to discriminate signal from background, and apply a binned likelihood calculation to the neural network output distributions to derive the final limits. No direct observation of single top quark production has been made, and I report expected/measured 95% confidence level limits of 3.5/8.0 pb.
Publisher:
ISBN:
Category :
Languages : en
Pages : 225
Book Description
I have performed a search for t-channel single top quark production in p$ar{p}$ single number sub collisions at 1.96 TeV on a 366 pb-1 dataset collected with the D0 detector from 2002-2005. The analysis is restricted to the leptonic decay of the W boson from the top quark to an electron or muon, tq$ar{b}$ → lvlb q$ar{b}$ (l = e,?). A powerful b-quark tagging algorithm derived from neural networks is used to identify b jets and significantly reduce background. I further use neural networks to discriminate signal from background, and apply a binned likelihood calculation to the neural network output distributions to derive the final limits. No direct observation of single top quark production has been made, and I report expected/measured 95% confidence level limits of 3.5/8.0 pb.
Search for Single Top Quark Production in P Anti-p Collisions at S**1/2
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
Book Description
We present a search for electroweak production of single top quarks in the s-channel and t-channel using neural networks for signal-background separation. We have analyzed 230 pb−1 of data collected with the D0 detector at the Fermilab Tevatron Collider at a center-of-mass energy of 1.96 TeV and find no evidence for a single top quark signal. The resulting 95% confidence level upper limits on the single top quark production cross sections are 6.4 pb in the s-channel and 5.0 pb in the t-channel.
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
Book Description
We present a search for electroweak production of single top quarks in the s-channel and t-channel using neural networks for signal-background separation. We have analyzed 230 pb−1 of data collected with the D0 detector at the Fermilab Tevatron Collider at a center-of-mass energy of 1.96 TeV and find no evidence for a single top quark signal. The resulting 95% confidence level upper limits on the single top quark production cross sections are 6.4 pb in the s-channel and 5.0 pb in the t-channel.
Top Physics: Search for Electroweak Single Top Quark Production in P Anti-p Collisions at S**(1/2)
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We report on a search for Standard Model t-channel and s-channel single top quark production in p{bar p} collisions at a center of mass energy of 1.96 TeV. We use a data sample corresponding to 162 pb−1 recorded by the upgraded Collider Detector at Fermilab. We find no significant evidence for electroweak top quark production and set upper limits at the 95% confidence level on the production cross section, consistent with the Standard Model: 10.1 pb for the t-channel, 13.6 pb for the s-channel and 17.8 pb for the combined cross section of t- and s-channel.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We report on a search for Standard Model t-channel and s-channel single top quark production in p{bar p} collisions at a center of mass energy of 1.96 TeV. We use a data sample corresponding to 162 pb−1 recorded by the upgraded Collider Detector at Fermilab. We find no significant evidence for electroweak top quark production and set upper limits at the 95% confidence level on the production cross section, consistent with the Standard Model: 10.1 pb for the t-channel, 13.6 pb for the s-channel and 17.8 pb for the combined cross section of t- and s-channel.
Search for T-channel Single Top Quark Production in Pp ̄collisions at 1.96 TeV
Author: Philip Michael Perea
Publisher:
ISBN:
Category : Collisions (Nuclear physics)
Languages : en
Pages : 458
Book Description
Publisher:
ISBN:
Category : Collisions (Nuclear physics)
Languages : en
Pages : 458
Book Description
Search for T-channel Single Top Quark Production in Pp {u02C9}collisions at 1.96 TeV
Author: Philip Michael Perea
Publisher:
ISBN: 9780542800849
Category : Collisions (Nuclear physics)
Languages : en
Pages : 416
Book Description
I have performed a search for t-channel single top quark production in pp¯ collisions at 1.96 TeV on a 366 pb-1 dataset collected with the DO detector from 2002--2005. The analysis is restricted to the leptonic decay of the W boson from the top quark to an electron or muon, tqb¯ → lnulb qb¯ (l = e, mu). A powerful b-quark tagging algorithm derived from neural networks is used to identify b jets and significantly reduce background. I further use neural networks to discriminate signal from background, and apply a binned likelihood calculation to the neural network output distributions to derive the final limits. No direct observation of single top quark production has been made, and I report expected/measured 95% confidence level limits of 3.5/8.0 pb.
Publisher:
ISBN: 9780542800849
Category : Collisions (Nuclear physics)
Languages : en
Pages : 416
Book Description
I have performed a search for t-channel single top quark production in pp¯ collisions at 1.96 TeV on a 366 pb-1 dataset collected with the DO detector from 2002--2005. The analysis is restricted to the leptonic decay of the W boson from the top quark to an electron or muon, tqb¯ → lnulb qb¯ (l = e, mu). A powerful b-quark tagging algorithm derived from neural networks is used to identify b jets and significantly reduce background. I further use neural networks to discriminate signal from background, and apply a binned likelihood calculation to the neural network output distributions to derive the final limits. No direct observation of single top quark production has been made, and I report expected/measured 95% confidence level limits of 3.5/8.0 pb.
Measurement of the Single Top Quark Production Cross Section in 1.96-TeV Proton-Antiproton Collisions
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 157
Book Description
Top quarks are predominantly produced in pairs via the strong interaction in {bar p}p collisions at √s = 1.96 TeV . The top quark has a weak isospin 1/2, composing a weak isospin doublet with the bottom quark. This characteristic predicts not only top quark pair production via strong interaction but also single production together with a bottom quark via weak interaction. However, finding single top quark production is challenging since it is rarely produced ([sigma]{sub singletop} = 2.9 pb) against background processes with the same final state like W+jets and t{bar t}. A measurement of electroweak single top production probes the W-t-b vertex, which provides a direct determination of the Cabbibo-Kobayashi-Maskawa (CKM) matrix element.
Publisher:
ISBN:
Category :
Languages : en
Pages : 157
Book Description
Top quarks are predominantly produced in pairs via the strong interaction in {bar p}p collisions at √s = 1.96 TeV . The top quark has a weak isospin 1/2, composing a weak isospin doublet with the bottom quark. This characteristic predicts not only top quark pair production via strong interaction but also single production together with a bottom quark via weak interaction. However, finding single top quark production is challenging since it is rarely produced ([sigma]{sub singletop} = 2.9 pb) against background processes with the same final state like W+jets and t{bar t}. A measurement of electroweak single top production probes the W-t-b vertex, which provides a direct determination of the Cabbibo-Kobayashi-Maskawa (CKM) matrix element.
Juryfreie Kunstausstellung, Berlin 1955
Author:
Publisher:
ISBN:
Category : Art, German
Languages : en
Pages : 36
Book Description
Publisher:
ISBN:
Category : Art, German
Languages : en
Pages : 36
Book Description
Search for Electroweak Single Top Quark Production in 1.96 TeV Proton-antiproton Collisions [microform]
Author: Stelzer, Bernd
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN: 9780494078129
Category : Physics Theses
Languages : en
Pages : 256
Book Description
This thesis describes the first search for electroweak single top quark production in proton-antiproton collisions at a center of mass energy of 1.96 TeV. The data sample used for this analysis corresponds to 162 pb -1 recorded by the upgraded Collider Detector at Fermilab. The search is performed by doing a classic maximum likelihood fit to the H T distribution in data. The kinematic variable H T is the scalar sum of transverse energies of all final state particles in the event. This variable has the advantage that its distribution looks very similar for both contributing (s-channel and t-channel) single top processes, but is different for background processes. The combination of both channels to one signal improves the sensitivity of the search. No significant evidence for electroweak single top quark production is found and we set an upper limit at the 95% confidence level on the combined single top quark production cross section of 17.8 pb.
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN: 9780494078129
Category : Physics Theses
Languages : en
Pages : 256
Book Description
This thesis describes the first search for electroweak single top quark production in proton-antiproton collisions at a center of mass energy of 1.96 TeV. The data sample used for this analysis corresponds to 162 pb -1 recorded by the upgraded Collider Detector at Fermilab. The search is performed by doing a classic maximum likelihood fit to the H T distribution in data. The kinematic variable H T is the scalar sum of transverse energies of all final state particles in the event. This variable has the advantage that its distribution looks very similar for both contributing (s-channel and t-channel) single top processes, but is different for background processes. The combination of both channels to one signal improves the sensitivity of the search. No significant evidence for electroweak single top quark production is found and we set an upper limit at the 95% confidence level on the combined single top quark production cross section of 17.8 pb.
Search for Electroweak Single Top Quark Production in 1.96-TeV Proton-antiproton Collisions
Author: Bernd Stelzer
Publisher:
ISBN:
Category :
Languages : en
Pages : 143
Book Description
This thesis describes the first search for electroweak single top quark production in proton-antiproton collisions at a center of mass energy of 1.96 TeV. The data sample used for this analysis corresponds to 162 pb{sup -1} recorded by the upgraded Collider Detector at Fermilab. The search is performed by doing a classic maximum likelihood fit to the H{sub T} distribution in data. The kinematic variable H{sub T} is the scalar sum of transverse energies of all final state particles in the event. This variable has the advantage that its distribution looks very similar for both contributing (s-channel and t-channel) single top processes, but is different for background processes. The combination of both channels to one signal improves the sensitivity of the search. No significant evidence for electroweak single top quark production is found and we set an upper limit at the 95% confidence level on the combined single top quark production cross section of 17.8 pb.
Publisher:
ISBN:
Category :
Languages : en
Pages : 143
Book Description
This thesis describes the first search for electroweak single top quark production in proton-antiproton collisions at a center of mass energy of 1.96 TeV. The data sample used for this analysis corresponds to 162 pb{sup -1} recorded by the upgraded Collider Detector at Fermilab. The search is performed by doing a classic maximum likelihood fit to the H{sub T} distribution in data. The kinematic variable H{sub T} is the scalar sum of transverse energies of all final state particles in the event. This variable has the advantage that its distribution looks very similar for both contributing (s-channel and t-channel) single top processes, but is different for background processes. The combination of both channels to one signal improves the sensitivity of the search. No significant evidence for electroweak single top quark production is found and we set an upper limit at the 95% confidence level on the combined single top quark production cross section of 17.8 pb.