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Download or read book written by and published by . This book was released on 1818 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Precise Measurement of the Left right Cross Section Asymmetry in Z Boson Production

Download or read book A Precise Measurement of the Left right Cross Section Asymmetry in Z Boson Production written by Amitabh Lath and published by . This book was released on 1994 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Precise Measurement of the Left right Cross Section Asymmetry in Z Boson Production

Download or read book A Precise Measurement of the Left right Cross Section Asymmetry in Z Boson Production written by and published by . This book was released on 1994 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis presents a measurement of the left-right asymmetry, A{sub LR}, n the production cross section of Z Bosons produced by ee− annihilations, using polarized electrons, at a center of mass energy of 91.26 Gev. The data presented was recorded by the SLD detector at the SLAC Linear Collider during the 1993 run. The mean luminosity-weighted polarization of the electron beam was [rho]{sup lum} = (63.0±1.1)%. Using a sample of 49,392 Z events, we measure A{sub LR} to be 0.1626±0.0071(stat)±0.0030(sys.), which determined the effective weak mixing angle to be sin2 [theta]{sub W}{sup eff} = 0.2292±0.0009(stat.)±0.0004(sys.). This result differs from that expected by the Standard Model of Particles and Fields by 2.5 standard deviations.

Book Precise Measurement of the Left right Cross Section Asymmetry in Z Boson Production by E sup  e sup minus  Collisions

Download or read book Precise Measurement of the Left right Cross Section Asymmetry in Z Boson Production by E sup e sup minus Collisions written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a precise measurement of the left-right cross section asymmetry (A[sub LR]) for Z boson production by e[sup+]e[sup[minus]] collisions. The measurement was performed at a center-of-mass energy of 91.26 GeV with the SLD detector at the SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the SLC electron beam was (63.0[+-] 1.1)%. Using a sample of 49,392 Z decays, they measure A[sub LR] to be 0.1628[+-] 0.0071 (stat.)[+-] 0.0028(syst.) which determines the effective weak mixing angle to be sin[sup 2][theta][sub W][sup eff]= 0.2292[+-] 0.0009(stat.)[+-] 0.0004(syst.). They combine this result with the result obtained in 1992 and obtain sin[sup 2][theta][sub W][sup eff]= 0.2294[+-] 0.0010, which constitutes the best measurement of sin[sup 2][theta][sub W][sup eff] in a single experiment presently available.

Book Precise Measurement of the Left right Cross Section Asymmetry in Z Boson Production by Ee    Collisions

Download or read book Precise Measurement of the Left right Cross Section Asymmetry in Z Boson Production by Ee Collisions written by and published by . This book was released on 1994 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a precise measurement of the left-right cross section asymmetry (A{sub LR}) for Z boson production by ee− collisions. The measurement was performed at a center-of-mass energy of 91.26 GeV with the SLD detector at the SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the SLC electron beam was (63.0 ± 1.1)%. Using a sample of 49,392 Z decays, they measure A{sub LR} to be 0.1628 ± 0.0071 (stat.) ± 0.0028(syst.) which determines the effective weak mixing angle to be sin2 [theta]{sub W}{sup eff} = 0.2292 ± 0.0009(stat.) ± 0.0004(syst.). They combine this result with the result obtained in 1992 and obtain sin2 [theta]{sub W}{sup eff} = 0.2294 ± 0.0010, which constitutes the best measurement of sin2 [theta]{sub W}{sup eff} in a single experiment presently available.

Book Measurement of the Left Right Cross Section Asymmetry in Z Boson Production in E e  Collisions

Download or read book Measurement of the Left Right Cross Section Asymmetry in Z Boson Production in E e Collisions written by and published by . This book was released on 2008 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A precise measurement of the left-right cross section asymmetry (A{sub LR}) for Z boson production by ee− collisions has been performed at the SLAC Linear Collider with the SLD detector. Data for the 1993 run, with its significant improvements in luminosity and electron beam polarization, are presented. When combined with the (less precise) 1992 result, the preliminary result for the effective weak mixing angle is sin2 [theta]{sub W}{sup eff} = 0.2290 ± 0.0010.

Book The First Measurement of the Left Right Cross Section Asymmetry in Z Boson Production

Download or read book The First Measurement of the Left Right Cross Section Asymmetry in Z Boson Production written by and published by . This book was released on 2004 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first measurement of the left-right cross section asymmetry (A{sub LR}) in Z° boson production has been made with the SLAC Large Detector (SLD) at the SLAC Linear Collider (SLC). The measurement was performed at a center-of-mass energy (E{sub cm}) of 91.55 GeV with a longitudinally polarized electron beam. The average beam polarization was (22.4 ± 0.6)%. Using a sample of 10,224 Z° decays, A{sub LR} is measured to be 0.102 ± 0.O44(stat) ± 0.003(syst), which determines the effective electroweak mixing angle to be sin2 [theta]{sub W}{sup eff} = 0.2375 ± 0.0056(stat) ± 0.0004(syst).

Book The First Measurement of the Left Right Cross Section Asymmetry in Z Boson Production

Download or read book The First Measurement of the Left Right Cross Section Asymmetry in Z Boson Production written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The first measurement of the left-right cross section asymmetry (A[sub LR]) in Z[sup 0] boson production has been made with the SLAC Large Detector (SLD) at the SLAC Linear Collider (SLC). The measurement was performed at a center-of-mass energy (E[sub cm]) of 91.55 GeV with a longitudinally polarized electron beam. The average beam polarization was (22.4 [+-] 0.6)%. Using a sample of 10,224 Z[sup 0] decays, A[sub LR] is measured to be 0.102 [+-] 0.O44(stat) [+-] 0.003(syst), which determines the effective electroweak mixing angle to be sin[sup 2] [theta][sub W][sup eff] = 0.2375 [+-] 0.0056(stat) [+-] 0.0004(syst).

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.