Symmetries in the angular distribution of exclusive semileptonic B decays

Tobias Hurth; Ulrik Egede; Joaquim Matias; Marc Ramon; Will Reece

doi:10.22323/1.120.0245

Symmetries in the angular distribution of exclusive semileptonic B decays

Tobias Hurth, Ulrik Egede, Joaquim Matias, Marc Ramon, Will Reece

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

Abstract

We discuss a method to construct observables protected against QCD uncertainties based on the angular distribution of the exclusive B_d → K^∗0(→ Kπ)l⁺l⁻ decay. We focus on the identification and the interpretation of all the symmetries of the distribution. They constitute a key ingredient to construct a set of so-called transverse observables. We work in the framework of QCD factorization at NLO supplemented by an estimate of power-suppressed Λ/m_b corrections. A discussion of the new physics properties of two of the transverse asymmetries, A⁽ _T ²⁾ and A⁽ _T ⁵⁾, is presented. A comparison between the transverse asymmetry A⁽ _T ²⁾ and the forward-backward asymmetry shows that A⁽ _T ²⁾ emerges as an improved version of it.

Original language	English
Title of host publication	Proceedings of Science
Subtitle of host publication	35th International Conference of High Energy Physics, ICHEP 2010; Paris; France; 22 July 2010 through 28 July 2010
Number of pages	7
Volume	120
DOIs	https://doi.org/10.22323/1.120.0245
Publication status	Published - 1 Jan 2010
Externally published	Yes
Event	International Conference of High Energy Physics, ICHEP 2010 - Paris, France Duration: 22 Jul 2010 → 28 Jul 2010 Conference number: 35th

Publication series

Name	Proceedings of Science
Publisher	Sissa Medialab, SRL
ISSN (Print)	1824-8039

Conference

Conference	International Conference of High Energy Physics, ICHEP 2010
Abbreviated title	ICHEP 2010
Country	France
City	Paris
Period	22/07/10 → 28/07/10

Access to Document

10.22323/1.120.0245Licence: CC BY-NC-SA

Link to publication in Scopus

Cite this

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title = "Symmetries in the angular distribution of exclusive semileptonic B decays",

abstract = "We discuss a method to construct observables protected against QCD uncertainties based on the angular distribution of the exclusive Bd → K∗0(→ Kπ)l+l− decay. We focus on the identification and the interpretation of all the symmetries of the distribution. They constitute a key ingredient to construct a set of so-called transverse observables. We work in the framework of QCD factorization at NLO supplemented by an estimate of power-suppressed Λ/mb corrections. A discussion of the new physics properties of two of the transverse asymmetries, A( T 2) and A( T 5), is presented. A comparison between the transverse asymmetry A( T 2) and the forward-backward asymmetry shows that A( T 2) emerges as an improved version of it.",

author = "Tobias Hurth and Ulrik Egede and Joaquim Matias and Marc Ramon and Will Reece",

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Hurth, T, Egede, U, Matias, J, Ramon, M & Reece, W 2010, Symmetries in the angular distribution of exclusive semileptonic B decays. in Proceedings of Science: 35th International Conference of High Energy Physics, ICHEP 2010; Paris; France; 22 July 2010 through 28 July 2010. vol. 120, Proceedings of Science, International Conference of High Energy Physics, ICHEP 2010, Paris, France, 22/07/10. https://doi.org/10.22323/1.120.0245

Symmetries in the angular distribution of exclusive semileptonic B decays. / Hurth, Tobias; Egede, Ulrik; Matias, Joaquim; Ramon, Marc; Reece, Will.

Proceedings of Science: 35th International Conference of High Energy Physics, ICHEP 2010; Paris; France; 22 July 2010 through 28 July 2010. Vol. 120 2010. (Proceedings of Science).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review

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AB - We discuss a method to construct observables protected against QCD uncertainties based on the angular distribution of the exclusive Bd → K∗0(→ Kπ)l+l− decay. We focus on the identification and the interpretation of all the symmetries of the distribution. They constitute a key ingredient to construct a set of so-called transverse observables. We work in the framework of QCD factorization at NLO supplemented by an estimate of power-suppressed Λ/mb corrections. A discussion of the new physics properties of two of the transverse asymmetries, A( T 2) and A( T 5), is presented. A comparison between the transverse asymmetry A( T 2) and the forward-backward asymmetry shows that A( T 2) emerges as an improved version of it.

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