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New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon
We present a calculation of the rates for Higgs-boson decays to a vector heavy-quarkonium state plus a photon, where the heavy-quarkonium states are the J/ψ and the ϒ(nS) states, with n=1, 2, or 3. The calculation is carried out in the light-cone formalism, combined with nonrelativistic QCD factoriz...
Autores principales: | , , , |
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Lenguaje: | eng |
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2016
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Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.95.054018 http://cds.cern.ch/record/2141293 |
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author | Bodwin, Geoffrey T. Chung, Hee Sok Ee, June-Haak Lee, Jungil |
author_facet | Bodwin, Geoffrey T. Chung, Hee Sok Ee, June-Haak Lee, Jungil |
author_sort | Bodwin, Geoffrey T. |
collection | CERN |
description | We present a calculation of the rates for Higgs-boson decays to a vector heavy-quarkonium state plus a photon, where the heavy-quarkonium states are the J/ψ and the ϒ(nS) states, with n=1, 2, or 3. The calculation is carried out in the light-cone formalism, combined with nonrelativistic QCD factorization, and is accurate at leading order in mQ2/mH2, where mQ is the heavy-quark mass and mH is the Higgs-boson mass. The calculation contains corrections through next-to-leading order in the strong-coupling constant αs and the square of the heavy-quark velocity v, and includes a resummation of logarithms of mH2/mQ2 at next-to-leading logarithmic accuracy. We have developed a new method, which makes use of Abel summation, accelerated through the use of Padé approximants, to deal with divergences in the resummed expressions for the quarkonium light-cone distribution amplitudes. This approach allows us to make definitive calculations of the resummation effects. Contributions from the order-αs and order-v2 corrections to the light-cone distribution amplitudes that we obtain with this new method differ substantially from the corresponding contributions that one obtains from a model light-cone distribution amplitude [M. König and M. Neubert, J. High Energy Phys. 08 (2015) 012JHEPFG1029-847910.1007/JHEP08(2015)012]. Our results for the real parts of the direct-process amplitudes are considerably smaller than those from one earlier calculation [G. T. Bodwin, H. S. Chung, J.-H. Ee, J. Lee, and F. Petriello, Phys. Rev. D 90, 113010 (2014)PRVDAQ1550-799810.1103/PhysRevD.90.113010], reducing the sensitivity to the Higgs-boson–heavy-quark couplings, and are somewhat smaller than those from another earlier calculation [M. König and M. Neubert, J. High Energy Phys. 08 (2015) 012JHEPFG1029-847910.1007/JHEP08(2015)012]. However, our results for the standard-model Higgs-boson branching fractions are in good agreement with those in M. König and M. Neubert, J. High Energy Phys. 08 (2015) 012JHEPFG1029-847910.1007/JHEP08(2015)012. |
id | cern-2141293 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2016 |
record_format | invenio |
spelling | cern-21412932023-05-31T02:02:49Zdoi:10.1103/PhysRevD.95.054018http://cds.cern.ch/record/2141293engBodwin, Geoffrey T.Chung, Hee SokEe, June-HaakLee, JungilNew approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photonhep-phParticle Physics - PhenomenologyWe present a calculation of the rates for Higgs-boson decays to a vector heavy-quarkonium state plus a photon, where the heavy-quarkonium states are the J/ψ and the ϒ(nS) states, with n=1, 2, or 3. The calculation is carried out in the light-cone formalism, combined with nonrelativistic QCD factorization, and is accurate at leading order in mQ2/mH2, where mQ is the heavy-quark mass and mH is the Higgs-boson mass. The calculation contains corrections through next-to-leading order in the strong-coupling constant αs and the square of the heavy-quark velocity v, and includes a resummation of logarithms of mH2/mQ2 at next-to-leading logarithmic accuracy. We have developed a new method, which makes use of Abel summation, accelerated through the use of Padé approximants, to deal with divergences in the resummed expressions for the quarkonium light-cone distribution amplitudes. This approach allows us to make definitive calculations of the resummation effects. Contributions from the order-αs and order-v2 corrections to the light-cone distribution amplitudes that we obtain with this new method differ substantially from the corresponding contributions that one obtains from a model light-cone distribution amplitude [M. König and M. Neubert, J. High Energy Phys. 08 (2015) 012JHEPFG1029-847910.1007/JHEP08(2015)012]. Our results for the real parts of the direct-process amplitudes are considerably smaller than those from one earlier calculation [G. T. Bodwin, H. S. Chung, J.-H. Ee, J. Lee, and F. Petriello, Phys. Rev. D 90, 113010 (2014)PRVDAQ1550-799810.1103/PhysRevD.90.113010], reducing the sensitivity to the Higgs-boson–heavy-quark couplings, and are somewhat smaller than those from another earlier calculation [M. König and M. Neubert, J. High Energy Phys. 08 (2015) 012JHEPFG1029-847910.1007/JHEP08(2015)012]. However, our results for the standard-model Higgs-boson branching fractions are in good agreement with those in M. König and M. Neubert, J. High Energy Phys. 08 (2015) 012JHEPFG1029-847910.1007/JHEP08(2015)012.We present a calculation of the rates for Higgs-boson decays to a vector heavy-quarkonium state plus a photon, where the heavy quarkonium states are the J/psi and the Upsilon(nS) states, with n=1, 2, or 3. The calculation is carried out in the light-cone formalism, combined with nonrelativistic QCD factorization, and is accurate at leading order in m_Q^2/m_H^2, where m_Q is the heavy-quark mass and m_H is the Higgs-boson mass. The calculation contains corrections through next-to-leading order in the strong-coupling constant alpha_s and the square of the heavy-quark velocity v, and includes a resummation of logarithms of m_H^2/m_Q^2 at next-to-leading logarithmic accuracy. We have developed a new method, which makes use of Abel summation, accelerated through the use of Pade approximants, to deal with divergences in the resummed expressions for the quarkonium light-cone distribution amplitudes. This approach allows us to make definitive calculations of the resummation effects. Contributions from the order-alpha_s and order-v^2 corrections to the light-cone distribution amplitudes that we obtain with this new method differ substantially from the corresponding contributions that one obtains from a model light-cone distribution amplitude [M. Koenig and M. Neubert, J. High Energy Phys. 08 (2015) 012]. Our results for the real parts of the direct-process amplitudes are considerably smaller than those from one earlier calculation [G. T. Bodwin, H. S. Chung, J.-H. Ee, J. Lee, and F. Petriello, Phys. Rev. D 90, 113010 (2014)], reducing the sensitivity to the Higgs-boson--heavy-quark couplings, and are somewhat smaller than those from another earlier calculation [M. Koenig and M. Neubert, J. High Energy Phys. 08 (2015) 012]. However, our results for the standard-model Higgs-boson branching fractions are in good agreement with those in M. Koenig and M. Neubert, J. High Energy Phys. 08 (2015) 012.arXiv:1603.06793oai:cds.cern.ch:21412932016-03-22 |
spellingShingle | hep-ph Particle Physics - Phenomenology Bodwin, Geoffrey T. Chung, Hee Sok Ee, June-Haak Lee, Jungil New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon |
title | New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon |
title_full | New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon |
title_fullStr | New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon |
title_full_unstemmed | New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon |
title_short | New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon |
title_sort | new approach to the resummation of logarithms in higgs-boson decays to a vector quarkonium plus a photon |
topic | hep-ph Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1103/PhysRevD.95.054018 http://cds.cern.ch/record/2141293 |
work_keys_str_mv | AT bodwingeoffreyt newapproachtotheresummationoflogarithmsinhiggsbosondecaystoavectorquarkoniumplusaphoton AT chungheesok newapproachtotheresummationoflogarithmsinhiggsbosondecaystoavectorquarkoniumplusaphoton AT eejunehaak newapproachtotheresummationoflogarithmsinhiggsbosondecaystoavectorquarkoniumplusaphoton AT leejungil newapproachtotheresummationoflogarithmsinhiggsbosondecaystoavectorquarkoniumplusaphoton |