Measurement Of The B0 Anti B0 Oscillation Frequency With Inclusive Dilepton Events

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Measurement Of The B0 Anti B0 Oscillation Frequency With Inclusive Dilepton Events

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Author :
language : en
Publisher:
Release Date : 2002

Measurement Of The B0 Anti B0 Oscillation Frequency With Inclusive Dilepton Events 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.

The B[sup 0]-[bar B][sup 0] oscillation frequency has been measured with a sample of 23 million B[bar B] pairs collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we select events in which both B mesons decay semileptonically and use the charge of the leptons to identify the flavor of each B meson. A simultaneous fit to the decay time difference distributions for opposite- and same-sign dilepton events gives[Delta]m[sub d]= 0.493[+-] 0.012 (stat)[+-] 0.009 (syst) ps[sup -1].

Introduction To The Standard Model

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Author : Stuart Raby
language : en
Publisher: Cambridge University Press
Release Date : 2021-07-08

Introduction To The Standard Model written by Stuart Raby and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-07-08 with Science categories.

Develops a practical understanding of the theoretical concepts required to understand the Standard Model for a two-semester graduate course.

Energy Research Abstracts

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Author :
language : en
Publisher:
Release Date : 1994-04

Energy Research 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 1994-04 with Power resources categories.

American Doctoral Dissertations

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language : en
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Release Date : 1997

American Doctoral Dissertations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Dissertation abstracts categories.

High Energy Physics Index

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language : en
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Release Date : 1990

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 1990 with Nuclear physics categories.

Scientific And Technical Aerospace Reports

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language : en
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Release Date : 1995

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.

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.

Measurement Of The Time Dependence Of B0 B0 Bar Oscillations Using Inclusive Dilepton Events

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Author :
language : en
Publisher:
Release Date : 2000

Measurement Of The Time Dependence Of B0 B0 Bar Oscillations Using Inclusive Dilepton Events written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.

Inis Atomindex

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Author :
language : en
Publisher:
Release Date : 1977-07

Inis Atomindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977-07 with Nuclear energy categories.

Government Reports Annual Index

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Author :
language : en
Publisher:
Release Date : 1985

Government Reports Annual 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 1985 with Research categories.

Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Bobo Mixing Meseasurement At Belle Using Dilepton Events Tagged With A Soft Pion

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language : en
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Bobo Mixing Meseasurement At Belle Using Dilepton Events Tagged With A Soft Pion written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.

The Belle experiment is located in the KEK research centre (Japan) and is primarily devoted to the study of CP violation in the B meson sector. Belle is placed on the KEKB collider, one of the two currently running "B-meson factories", which produce Banti-B pairs. KEKB has created more than 150 million pairs in total, a world record for this kind of colliders. This large sample allows very precise measurements in the physics of beauty mesons. The present analysis falls within the framework of these precise measurements. One of the most remarkable phenomena in high-energy physics is the ability of weak interactions to couple a neutral meson to its anti-meson. In this work, we study the coupling of neutral B with neutral anti-B meson, which induces an oscillation of frequency _md we can measure accurately. Besides the interest of this phenomenon itself, this measurement plays an important role in the quest for the origin of CP violation. The standard model of electro-weak interactions does not include CP violation in a fully satisfactory way. The search for yet unexplained physical phenomena is, therefore, the main motivation of the Belle collaboration. Many measurements of _md have previously been performed. The present work, however, leads to a precision on _md that was never reached before. This is the result of the excellent performance of KEKB, and of an original approach that allows to considerably reduce background contamination of pertinent events. This approach was already successfully used by other collaborations, in slightly different conditions as here. The method we employed consists in the partial reconstruction of one of the B mesons through the decay channel ___D*(D0_)l_l, where only the information on the lepton l and the pion _ are used. The information on the other B meson of the initial Banti-B pair is extracted from a single high-energy lepton. The available sample of Banti-B pairs thus does not suffer from large reductions due to complete reconst.