Measurement Of The B To Pi L Nu Branching Fraction And Determination Of

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Measurement Of The B0 To Pi L Nu And B To Pi0 L Nu Branching Fractions And Determination Of

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of The B0 To Pi L Nu And B To Pi0 L Nu Branching Fractions And Determination Of written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The authors report preliminary measurements of the charmless exclusive semileptonic branching fractions of the B° → ?−l+? and B+ → ?°l+? decays, based on 211 fb−1 of data collected at the ?(4S) resonance by the BABAR detector. In events in which the decay of one B meson to a hadronic final state is fully reconstructed, the semileptonic decay of the second B meson is identified by the detection of a charged lepton and a pion. They measure the partial branching fractions for B° → ?−l+? and B+ → ?°l+? in three regions of the invariant mass squared of the lepton pair, and they obtain the total branching fractions ?(B° → ?−l+?) = (1.14 ± 0.27{sub stat} ± 0.17{sub syst}) x 10−4 and ?(B+ → ?°l+?) = (0.86 ± 0.22{sub stat} ± 0.11{sub syst}) x 10−4. Using isospin symmetry, they measure the combined total branching fraction ?(B° → ?−l+?) = (1.28 ± 0.23{sub stat} ± 0.16{sub syst}) x 10−4. Theoretical predictions of the form-factor are used to determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element.

Measurement Of The B To Pi L Nu Branching Fraction And Determination Of

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Author :
language : en
Publisher:
Release Date : 2006

Measurement Of The B To Pi L Nu Branching Fraction And Determination Of 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.

We report a measurement of the B →?l? branching fraction based on 211 fb−1 of data collected with the BABAR detector. We use samples of B° and B mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay, and combine the results assuming isospin symmetry to obtain?(B° →?−l+?) = (1.33 ± 0.17{sub stat} ± 0.11{sub syst}) x 10−4. We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element.

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of

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Author :
language : en
Publisher:
Release Date : 2006

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of 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 report the results of a study of the exclusive charmless semileptonic B° →?−l? decay undertaken with approximately 227 million B{bar B} pairs collected at the?(4S) resonance with the BABAR detector. The analysis uses events in which the signal B mesons are reconstructed with a novel loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q2, the l+? invariant mass squared, from which we extract the f+(q2) form factor shape and the total branching fraction:?(B° →?−l+?) = 1.44 ± 0.08{sub stat} ± 0.10{sub syst} x 10−4. Based on a recent theoretical calculation of the form factor, we find the magnitude of the CKM matrix element.

Physics Is Fun Memoirs Of A Life In Physics

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Author : Richard Wilson
language : en
Publisher: Richard Wilson
Release Date : 2011

Physics Is Fun Memoirs Of A Life In Physics written by Richard Wilson and has been published by Richard Wilson this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Physicists categories.

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of

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Author :
language : en
Publisher:
Release Date : 2006

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of 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.

We report the results of a study of the exclusive charmless semileptonic decay, B° →?−l?, undertaken with approximately 227 million B{bar B} pairs collected at the?(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with an innovative loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q2, the momentum transfer squared, from which we extract the f+(q2) form-factor shape and the total branching fraction?(B° →?−l+?) = (1.46 ± 0.07{sub stat} ± 0.08{sub syst}) x 10−4. Based on a recent unquenched lattice QCD calculation of the form factor in the range q2> 16 GeV2, we find the magnitude of the CKM matrix element.

Measurements Of B To Pi Eta Eta L Nu Branching Fractions Anddetermination Of

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Author :
language : en
Publisher:
Release Date : 2008

Measurements Of B To Pi Eta Eta L Nu Branching Fractions Anddetermination Of written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

High Energy Physics Index

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Author :
language : en
Publisher:
Release Date : 1994

High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Particles (Nuclear physics) categories.

Nuclear Science Abstracts

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Author :
language : en
Publisher:
Release Date : 1976-03

Nuclear Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976-03 with Nuclear energy categories.

Frontiers In Physics 2019 Editor S Choice

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Author : Alex Hansen
language : en
Publisher: Frontiers Media SA
Release Date : 2020-05-19

Frontiers In Physics 2019 Editor S Choice written by Alex Hansen and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-19 with categories.

Frontiers in Physics – FPHY – is now in its eighth year. Up to last year, the journal received a slowly increasing trickle of manuscripts, and then during the summer… Boom! The number of manuscripts we receive started increasing exponentially. This is of course a signal to us who are associated with the journal that we are on the right track to build a first-rate journal spanning the entire field of physics. And it is not the only signal. We also see it in other indicators such as the number of views and downloads, Impact Factor and the Cite Score. Should we be surprised at this increase? If I were to describe FPHY in one word, it would be “innovation”. Attaching the names of the reviewers that have endorsed publication permanently to the published paper is certainly in this class. It ensures that the reviewers are accountable; furthermore, the level of transparency this implies ensures that any conflict of interest is detected at the very beginning of the process. The review process itself is innovative. After an initial review that proceeds traditionally, the reviewers and authors enter a back-and-forth dialog that irons out any misunderstanding. The reviewers retain their anonymity throughout the process. The entire review process and any question concerning editorial decisions is fully in the hands of active scientists. The Frontiers staff is not allowed to make any such decision. They oversee the process and make sure that the manuscript and the process leading to publication or rejection upholds the standard. FPHY is of course a gold open access journal. This is the only scientific publication model that is compatible with the information revolution. A journal’s prestige is traditionally associated with how difficult it is to publish there. Exclusivity as criterion for desirability, is a mechanism we know very well from the consumer market. However, is this criterion appropriate for scientific publishing? It is almost by definition not possible to predict the importance of a new idea – otherwise it would not have been new. So, why should journals make decisions on publishing based on predicting the possible importance of a given work. This can only be properly assessed after publication. Frontiers has removed “importance” from the list of criteria for publication. That the work is new, is another matter: the work must be new and scientifically correct. It would seem that removing the criterion of “importance” would be a risky one, but it turns out not to be. The Specialty Chief Editors who lead the 18 sections that constitute FPHY, have made this selection of papers published in FPHY in 2019. We have chosen the papers that we have found most striking. Even though this is far from a random selection, they do give a good idea of what PFHY is about. Enjoy! We certainly did while making this selection. Professor Alex Hansen (Field Chief Editor)

Phenomena Beyond The Standard Model What Do We Expect For New Physics To Look Like

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Author : Roman Pasechnik
language : en
Publisher: Frontiers Media SA
Release Date : 2020-09-03

Phenomena Beyond The Standard Model What Do We Expect For New Physics To Look Like written by Roman Pasechnik and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-09-03 with Science categories.

This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.