Observation of Y(3940) to J/psi Omega in B to J/psi Omega K at BABAR. PDF Download
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Languages : en
Pages : 7
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The authors report the results of a study of the decays B 2!J/[psi][omega]K and B° 2!J/[psi][omega]K{sub S}° using 383 million B{bar B} events from [Upsilon](4S) decays with the BABAR detector at the PEP-II asymmetric-energy e+e− storage rings. They observe evidence for Y(3940) 2!J/[psi][omega] with product branching fractions [Beta](B+ 2!Y K+, Y 2!J/[psi][omega]) = (4.9 ± 1.0(stat) ± 0.5(syst)) x 10−5 and [Beta](B° 2!Y K°, Y 2!J/[psi][omega]) = (1.5{sub -1.2}{sup +1.4}(stat){sub -0.2}{sup +0.2}(syst)) x 10−5. The measured mass and width are M(Y) = (3914.6{sub -3.4}{sup +3.8}(stat){sub -1.9}{sup +1.9}(syst)) MeV/c2 and [Lambda](Y) = (33−{sup +12}(stat)−5{sup +5}(syst)) MeV, respectively.
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Languages : en
Pages : 7
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The authors report the results of a study of the decays B 2!J/[psi][omega]K and B° 2!J/[psi][omega]K{sub S}° using 383 million B{bar B} events from [Upsilon](4S) decays with the BABAR detector at the PEP-II asymmetric-energy e+e− storage rings. They observe evidence for Y(3940) 2!J/[psi][omega] with product branching fractions [Beta](B+ 2!Y K+, Y 2!J/[psi][omega]) = (4.9 ± 1.0(stat) ± 0.5(syst)) x 10−5 and [Beta](B° 2!Y K°, Y 2!J/[psi][omega]) = (1.5{sub -1.2}{sup +1.4}(stat){sub -0.2}{sup +0.2}(syst)) x 10−5. The measured mass and width are M(Y) = (3914.6{sub -3.4}{sup +3.8}(stat){sub -1.9}{sup +1.9}(syst)) MeV/c2 and [Lambda](Y) = (33−{sup +12}(stat)−5{sup +5}(syst)) MeV, respectively.
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Category :
Languages : en
Pages : 13
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Author: Racha Cheaib
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ISBN: 9780494839188
Category :
Languages : en
Pages :
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![Observation of the Narrow State X (3872) --] J/psi Pi+ Pi- in Pbar P Collisions at S**(1/2) PDF](https://books.google.com/books/content/images/frontcover/Z4zqjwEACAAJ?fife=w80-h100)
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Languages : en
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Category :
Languages : en
Pages : 17
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The authors report the observation of the bottom, doubly-strange baryon?{sub b}− through the decay chain?{sub b}− → J/??−, where J/? →??−,?− →?K−, and? → p?−, using 4.2 fb−1 of data from p{bar p} collisions at √s = 1.96 TeV, and recorded with the Collider Detector at Fermilab. A signal is observed whose probability of arising from a background fluctuation is 4.0 x 10−8, or 5.5 Gaussian standard deviations. The?{sub b}− mass is measured to be 6054.4 ± 6.8(stat.) ± 0.9(syst.) MeV/c2. The lifetime of the?{sub b}− baryon is measured to be 1.13{sub -0.40}{sup +0.53}(stat.) ± 0.02(syst.) ps. In addition, for the?{sub b}− baryon they measure a mass of 5790.9 ± 2.6(stat.) ± 0.8(syst.) MeV/c2 and a lifetime of 1.56{sub -0.25}{sup +0.27}(stat.) ± 0.02(syst.) ps.
Author: B. Aubert
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Category :
Languages : en
Pages : 7
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The authors report the first observation of an excited singly-charmed baryon {Omega}*{sub c} (css) in the radiative decay {Omega}{sub c}{sup 0}{gamma}, where the {Omega}{sub c}{sup 0} baryon is reconstructed in the decays to the final states {Omega}{sup -}{pi}{sup +}, {Omega}{sup -} {pi}{sup +}{pi}{sup 0}, {Omega}{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +}, and {Xi}{sup -} K{sup -} {pi}{sup +}{pi}{sup +}. This analysis is performed using a dataset of 230.7 fb{sup -1} collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. The mass difference between the {Omega}*{sub c} and the {Omega}{sub c}{sup 0} baryons is measured to be 70.8 {+-} 1.0(stat) {+-} 1.1(syst) MeV/c{sup 2}. They also measure the ratio of inclusive production cross sections of {Omega}*{sub c} and {Omega}{sub c}{sup 0} in e{sup +}e{sup -} annihilation.
Author: Fay Ajzenberg-Selove
Publisher: Rutgers University Press
ISBN: 9780813520353
Category : Biography & Autobiography
Languages : en
Pages : 260
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When the author became a nuclear physicist, the number of women in the field could be counted on one hand. In this memoir, she reveals her difficult journey to international recognition in physics. She is frank about the ways being a woman has made a difference in her opportunities and choices as a scientist--and how, by being a woman, she has made a difference in the world of physics.
Author: S. Narison
Publisher: Cambridge University Press
ISBN: 9780521811644
Category : Science
Languages : en
Pages : 820
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An introduction to the basic theory and recent advances in QCD, for graduates and researchers.
Author: Stephan Narison
Publisher: World Scientific
ISBN: 9814507547
Category : Science
Languages : en
Pages : 545
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The aim of the book is to give an introduction to the method of QCD Spectral Sum Rules and to review its developments. After some general introductory remarks, Chiral Symmetry, the Historical Developments of the Sum Rules and the necessary materials for perturbative QCD including the MS regularization and renormalization schemes are discussed. The book also gives a critical review and some improvements of the wide uses of the QSSR in Hadron Physics and QSSR beyond the Standard Hadron Phenomenology. The author has participated actively in this field since 1978 just before the expanding success of the SVZ QSSR.
Author: J. J. J. Kokkedee
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 266
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