Electromagnetic quarkonium decays at order v7

Nora Brambilla; Emanuele Mereghetti; Antonio Vairo

doi:10.1088/1126-6708/2006/08/039

Electromagnetic quarkonium decays at order v⁷

Nora Brambilla, Emanuele Mereghetti, Antonio Vairo

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31 Scopus citations

Abstract

We compute S-wave and P-wave electromagnetic quarkonium decays at order v⁷ in the heavy-quark velocity expansion. In the S-wave case, our calculation confirms and completes previous findings. In the P-wave case, our results are in disagreement with previous ones; in particular, we find that two matrix elements less are needed. The cancellation of infrared singularities in the matching procedure is discussed.

Original language	English
Article number	039
Journal	Journal of High Energy Physics
Volume	2006
Issue number	8
DOIs	https://doi.org/10.1088/1126-6708/2006/08/039
State	Published - 1 Aug 2006
Externally published	Yes

Keywords

Heavy Quark Physics
QCD

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10.1088/1126-6708/2006/08/039

Cite this

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title = "Electromagnetic quarkonium decays at order v7",

abstract = "We compute S-wave and P-wave electromagnetic quarkonium decays at order v7 in the heavy-quark velocity expansion. In the S-wave case, our calculation confirms and completes previous findings. In the P-wave case, our results are in disagreement with previous ones; in particular, we find that two matrix elements less are needed. The cancellation of infrared singularities in the matching procedure is discussed.",

keywords = "Heavy Quark Physics, QCD",

author = "Nora Brambilla and Emanuele Mereghetti and Antonio Vairo",

year = "2006",

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doi = "10.1088/1126-6708/2006/08/039",

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AU - Brambilla, Nora

AU - Mereghetti, Emanuele

AU - Vairo, Antonio

PY - 2006/8/1

Y1 - 2006/8/1

N2 - We compute S-wave and P-wave electromagnetic quarkonium decays at order v7 in the heavy-quark velocity expansion. In the S-wave case, our calculation confirms and completes previous findings. In the P-wave case, our results are in disagreement with previous ones; in particular, we find that two matrix elements less are needed. The cancellation of infrared singularities in the matching procedure is discussed.

AB - We compute S-wave and P-wave electromagnetic quarkonium decays at order v7 in the heavy-quark velocity expansion. In the S-wave case, our calculation confirms and completes previous findings. In the P-wave case, our results are in disagreement with previous ones; in particular, we find that two matrix elements less are needed. The cancellation of infrared singularities in the matching procedure is discussed.

KW - Heavy Quark Physics

KW - QCD

UR - http://www.scopus.com/inward/record.url?scp=33748286808&partnerID=8YFLogxK

U2 - 10.1088/1126-6708/2006/08/039

DO - 10.1088/1126-6708/2006/08/039

M3 - Article

AN - SCOPUS:33748286808

SN - 1029-8479

VL - 2006

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 8

M1 - 039

ER -

Electromagnetic quarkonium decays at order v⁷

Abstract

Keywords

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