Symmetries in the angular distribution of exclusive semileptonic B decays

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

Symmetries in the angular distribution of exclusive semileptonic B decays

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

Research output: Contribution to conference › Paper › 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
Publication status	Published - 1 Dec 2011
Externally published	Yes
Event	6th International Workshop on the CKM Unitarity Triangle, CKM 2010 - Coventry, United Kingdom Duration: 6 Sept 2010 → 10 Sept 2010

Conference

Conference	6th International Workshop on the CKM Unitarity Triangle, CKM 2010
Country/Territory	United Kingdom
City	Coventry
Period	6/09/10 → 10/09/10

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, AT(2) and AT(5), is presented. A comparison between the transverse asymmetry AT (2) and the forward-backward asymmetry shows that AT (2) emerges as an improved version of it.",

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

year = "2011",

month = dec,

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language = "English",

note = "6th International Workshop on the CKM Unitarity Triangle, CKM 2010 ; Conference date: 06-09-2010 Through 10-09-2010",

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TY - CONF

T1 - Symmetries in the angular distribution of exclusive semileptonic B decays

AU - Egede, Ulrik

AU - Hurth, Tobias

AU - Matias, Joaquim

AU - Ramon, Marc

AU - Reece, Will

PY - 2011/12/1

Y1 - 2011/12/1

N2 - 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, AT(2) and AT(5), is presented. A comparison between the transverse asymmetry AT (2) and the forward-backward asymmetry shows that AT (2) emerges as an improved version of it.

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, AT(2) and AT(5), is presented. A comparison between the transverse asymmetry AT (2) and the forward-backward asymmetry shows that AT (2) emerges as an improved version of it.

UR - https://www.scopus.com/pages/publications/84881413973

M3 - Paper

AN - SCOPUS:84881413973

T2 - 6th International Workshop on the CKM Unitarity Triangle, CKM 2010

Y2 - 6 September 2010 through 10 September 2010

ER -

Symmetries in the angular distribution of exclusive semileptonic B decays

Abstract

Conference

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