Universality and mX cut effects in B ->Xsl+l-

PDF Version Also Available for Download.

Description

The most precise comparison between theory and experiment for the B {yields} X{sub s}{ell}{sup +}{ell}{sup -} rate is in the q{sup 2} < 6 GeV{sup 2} region. The hadronic uncertainties associated with an experimentally required cut on m{sub X} potentially spoil the extraction of short distance flavor-changing neutral current couplings. We compute the m{sub X} cut dependence of d{Lambda}(B {yields} X{sub s}{ell}{sup +}{ell}{sup -})/dq{sup 2} using the B {yields} X{sub s}{gamma} shape function, and show that the effect is universal for all short distance contributions in the limit m{sub X}{sup 2} << m{sub B}{sup 2}. This universality is not spoiled ... continued below

Creation Information

Lee, Keith S.M.; Ligeti, Zoltan; Stewart, Iain W. & Tackmann,Frank J. December 15, 2005.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

The most precise comparison between theory and experiment for the B {yields} X{sub s}{ell}{sup +}{ell}{sup -} rate is in the q{sup 2} < 6 GeV{sup 2} region. The hadronic uncertainties associated with an experimentally required cut on m{sub X} potentially spoil the extraction of short distance flavor-changing neutral current couplings. We compute the m{sub X} cut dependence of d{Lambda}(B {yields} X{sub s}{ell}{sup +}{ell}{sup -})/dq{sup 2} using the B {yields} X{sub s}{gamma} shape function, and show that the effect is universal for all short distance contributions in the limit m{sub X}{sup 2} << m{sub B}{sup 2}. This universality is not spoiled by realistic values of the m{sub X} cut, nor by {alpha}{sub s} corrections. Alternatively, normalizing the B {yields} X{sub s}{ell}{sup +}{ell}{sup -} rate to B {yields} X{sub u}{ell}{bar {nu}} with the same cuts removes the main uncertainties. We find that the forward-backward asymmetry vanishes near q{sub 0}{sup 2} = 3 GeV{sup 2}.

Source

  • Journal Name: Physical Review D; Journal Volume: 74; Related Information: Journal Publication Date: 2006

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Report No.: LBNL--59134
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 889891
  • Archival Resource Key: ark:/67531/metadc874040

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • December 15, 2005

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

Description Last Updated

  • Sept. 30, 2016, 12:57 p.m.

Usage Statistics

When was this article last used?

Congratulations! It looks like you are the first person to view this item online.

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Lee, Keith S.M.; Ligeti, Zoltan; Stewart, Iain W. & Tackmann,Frank J. Universality and mX cut effects in B ->Xsl+l-, article, December 15, 2005; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc874040/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.