Light masses in short distance penguin loops

Mario Abud; Giulia Ricciardi; George Sterman

doi:10.1016/S0370-2693(98)00886-7

Light masses in short distance penguin loops

Mario Abud
, Giulia Ricciardi
, George Sterman

Institute for Theoretical Physics

University of Naples Federico II
National Institute for Nuclear Physics
Harvard University

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Penguin diagrams for decays such as b → (s,d)γ involve virtual loops of u or other light quarks. Logarithms of the virtual quark mass could, in principle, influence the phenomenological analysis of the decay. It is thus important to study these logarithms to all orders in QCD perturbation theory. In this paper we show that, at arbitrary order, the matrix elements of operators in the effective hamiltonian contributing to b → sγ are finite for the limit of m_u → 0 in penguin loops.

Original language	English
Pages (from-to)	169-176
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	437
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(98)00886-7
State	Published - Oct 1 1998

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title = "Light masses in short distance penguin loops",

abstract = "Penguin diagrams for decays such as b → (s,d)γ involve virtual loops of u or other light quarks. Logarithms of the virtual quark mass could, in principle, influence the phenomenological analysis of the decay. It is thus important to study these logarithms to all orders in QCD perturbation theory. In this paper we show that, at arbitrary order, the matrix elements of operators in the effective hamiltonian contributing to b → sγ are finite for the limit of mu → 0 in penguin loops.",

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AU - Abud, Mario

AU - Ricciardi, Giulia

AU - Sterman, George

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N2 - Penguin diagrams for decays such as b → (s,d)γ involve virtual loops of u or other light quarks. Logarithms of the virtual quark mass could, in principle, influence the phenomenological analysis of the decay. It is thus important to study these logarithms to all orders in QCD perturbation theory. In this paper we show that, at arbitrary order, the matrix elements of operators in the effective hamiltonian contributing to b → sγ are finite for the limit of mu → 0 in penguin loops.

AB - Penguin diagrams for decays such as b → (s,d)γ involve virtual loops of u or other light quarks. Logarithms of the virtual quark mass could, in principle, influence the phenomenological analysis of the decay. It is thus important to study these logarithms to all orders in QCD perturbation theory. In this paper we show that, at arbitrary order, the matrix elements of operators in the effective hamiltonian contributing to b → sγ are finite for the limit of mu → 0 in penguin loops.

UR - https://www.scopus.com/pages/publications/0347172116

U2 - 10.1016/S0370-2693(98)00886-7

DO - 10.1016/S0370-2693(98)00886-7

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AN - SCOPUS:0347172116

SN - 0370-2693

VL - 437

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -

Light masses in short distance penguin loops

Abstract

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