Measurement Of Ds And Ds Production In B Meson Decays And From Continuum E E Annihilation At Sqrt S

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Measurement Of Ds And Ds Production In B Meson Decays And From Continuum E E Annihilation At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2002

Measurement Of Ds And Ds Production In B Meson Decays And From Continuum E E Annihilation At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.

New measurements of D[sub s][sup+] and D*[sub s][sup+] meson production rates from B decays and from q[bar q] continuum events near the[Upsilon](4S) resonance are presented. Using 20.8 fb[sup -1] of data on the[Upsilon](4S) resonance and 2.6 fb[sup -1] off resonance, we find the inclusive branching fractions[Beta](B[yields] D[sub s][sup+]X)= (10.93[+-] 0.19[+-] 0.58[+-] 2.73)% and[Beta](B[yields] D*[sub s][sup+] X)= (7.9[+-] 0.8[+-] 0.7[+-] 2.0)%, where the first error is statistical, the second is systematic, and the third is due to the D[sub s][sup+][yields][phi][pi][sup+] branching fraction uncertainty. The branching fractions[Sigma][Beta](B[yields] D(*)[sub s][sup+][bar D](*))= (5.07[+-] 0.14[+-] 0.30[+-] 1.27)% and[Sigma][Beta](B[yields] D*[sub s][sup+][bar D](*))= (4.1[+-] 0.2[+-] 0.4[+-] 1.0)% are determined from the D(*)[sub s][sup+] momentum spectra.

Measurement Of D Sub S Sup And D Sub S Sup Production In B Meson Decays And From Continuum E Sup E Sup Annihilations At Radical

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Author :
language : en
Publisher:
Release Date : 2001

Measurement Of D Sub S Sup And D Sub S Sup Production In B Meson Decays And From Continuum E Sup E Sup Annihilations At Radical written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

New precise measurements of D[sub s][sup+] and D*[sub s][sup+] meson production from B mesons and q[bar q] continuum events near the[Upsilon](4S) resonance are presented in this paper. Using the BABAR data recorded in 1999 and 2000 of 20.8 fb[sup -1] on-resonance and 2.6 fb[sup -1] off-resonance, we measure the inclusive branching fractions (B[yields] D[sub s][sup+])= (10.93[+-] 0.19[+-] 0.58[+-] 2.73)% and (B[yields] D*[sub s][sup+])= (7.94[+-] 0.82[+-] 0.72[+-] 1.99)%, where the first error is statistical, the second is the systematic error, and the third is the error due to the D[sub s][sup+][yields][pi][sup+] branching fraction uncertainty. The branching fractions (B[yields] D[sup (*)][sub s][sup+][bar D](*))= (5.07[+-] 0.09[+-] 0.34[+-] 1.27)% and (B[yields] D*[sub s][sup+][bar D](*))= (4.07[+-] 0.42[+-] 0.53[+-] 1.02)% have been determined from the measured D[sup (*)][sub s][sup+] momentum spectra.

A Measurement Of D And Ds Production In Ee Annihilation At Square Root Of S

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Author : Derrell Durrett
language : en
Publisher:
Release Date : 1993

A Measurement Of D And Ds Production In Ee Annihilation At Square Root Of S written by Derrell Durrett and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Branching ratios (Nuclear physics) categories.

Measurement Of D Sub S And D Sub S Sup Production In B Meson Decays And From Continuum E E Annihilations At S

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Author :
language : en
Publisher:
Release Date : 2001

Measurement Of D Sub S And D Sub S Sup Production In B Meson Decays And From Continuum E E Annihilations At S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

New precise measurements of D{sub s} and D*{sub s}+ meson production from B mesons and q{bar q} continuum events near the?(4S) resonance are presented in this paper. Using the BABAR data recorded in 1999 and 2000 of 20.8 fb−1 on-resonance and 2.6 fb−1 off-resonance, we measure the inclusive branching fractions (B → D{sub s}+) = (10.93 ± 0.19 ± 0.58 ± 2.73)% and (B → D*{sub s}+) = (7.94 ± 0.82 ± 0.72 ± 1.99)%, where the first error is statistical, the second is the systematic error, and the third is the error due to the D{sub s}+ →?+ branching fraction uncertainty. The branching fractions (B → D{sup (*)}{sub s}+ {bar D}(*)) = (5.07 ± 0.09 ± 0.34 ± 1.27)% and (B → D*{sub s}+ {bar D}(*)) = (4.07 ± 0.42 ± 0.53 ± 1.02)% have been determined from the measured D{sup (*)}{sub s}+ momentum spectra.

D Meson Production In Ee Annihilation 3 7 To 7 0 Gev Total Cross Section Branching Ratio

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Author :
language : en
Publisher:
Release Date : 1979

D Meson Production In Ee Annihilation 3 7 To 7 0 Gev Total Cross Section Branching Ratio written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with categories.

The production of D mesons in ee− annihilation for the center-of-mass energy range 3.7 to 7.0 GeV was studied with the MARK I magnetic detector at SPEAR. A resonance was observed in the total cross section for hadron production in ee− annihilation at an energy just above the threshold for charm production. This resonance, which is named psi'', has a mass of 3772 +- 6 MeV/c2, a total width of 28 +- 5 MeV/c2, a partial width to electron pairs of 345 +- 85 eV/c2, and decays almost exclusively into D anti D pairs. The psi'' provides a rich source of background-free and kinematically well defined D mesons for study. From produced in the decay of the psi'' the masses of the D° and D/sup +/ mesons were determined to be 1863.3 +- 0.9 MeV/c2 and 1868.3 +- 0.9 MeV/c2 respectively. Also the branching fractions for D° decay to K−.pi./sup +/, anti K°.pi./sup +/.pi.− and K−.pi./sup +/.pi.−.pi./sup +/ were determined to be (2.2 +- 0.6)%, (4.0 +- 1.3)%, and (3.2 +- 1.1)% and the branching fractions for D/sup +/ decay to anti K°.pi./sup +/ and K−.pi./sup +/.pi./sup +/ to be (1.5 +- 0.60)% and (3.9 +- 1.0)%. The average number of kaons per D decay was found to be 0.52 +- 0.14 K°'s and 0.42 +- 0.12 K/sup +/'s. The rate for inclusive production of D mesons at center-of-mass energies above the psi'' was measured; it is found that it can account for most, if not all, of the observed increase in the total hadronic cross-section for center-of-mass energies above 4 GeV. The inclusive momentum and energy spectra for D's were measured at the highest available center-of-mass energy (7 GeV). The energy spectra are rapidly decreasing functions of energy with a slope similar to the slope of the charged pion spectrum at the same center-of-mass energy. This behavior suggests that the fragmentation function of the charmed quark into charmed mesons is a decreasing function of the scaling variable z = 2E/sub D//E/sub CM/. 81 references.

D S Production In B Meson Decay

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Author : Douglas Michael Gingrich
language : en
Publisher:
Release Date : 1988

D S Production In B Meson Decay written by Douglas Michael Gingrich and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.

Production And Decay Of The Ds And Ds Mesons In Ee Annihilation

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Author : Janis Anne McKenna
language : en
Publisher:
Release Date : 1988

Production And Decay Of The Ds And Ds Mesons In Ee Annihilation written by Janis Anne McKenna and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.

Measurements Of B Meson Decays To K And

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Author :
language : en
Publisher:
Release Date : 2006

Measurements Of B Meson Decays To K And written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

The authors describe searches for B meson decays to the charmless vector-vector final states?K* and?? in 89 million B{bar B} pairs produced in ee− annihilation at √s = 10.58 GeV.

Establishment Of Bs Meson Production At The Psi 5s Energy Using Beauty And Charm Decays

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Author : Radia Sia
language : en
Publisher:
Release Date : 2007

Establishment Of Bs Meson Production At The Psi 5s Energy Using Beauty And Charm Decays written by Radia Sia and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

To constrain our knowledge of Bs production at the Upsilon(5S) by making other measurements with other model dependencies, we examine CLEO-c data for other particle species than Ds, that are produced with much higher rate in Bs meson decays than in B meson decays. Such particle like eta, eta' and &phis;, with their ss quark composition, are expected to be enhanced in Ds than in D meson decays. We therefore measure the inclusive branching fractions of charm mesons, namely D0, D + and D+s , into etaX, eta'X, and &phis;X decays. We find that the rates from D+s are much larger than from D0 and D+.

On Production Of D And D Mesons In B Meson Decays

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Author : M. A. Shifman
language : en
Publisher:
Release Date : 1986

On Production Of D And D Mesons In B Meson Decays written by M. A. Shifman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.