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Title: New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1348048
Grant/Contract Number:
AC02-06CH11357
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 5; Related Information: CHORUS Timestamp: 2017-03-23 22:12:44; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Bodwin, Geoffrey T., Chung, Hee Sok, Ee, June-Haak, and Lee, Jungil. New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.054018.
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. United States. doi:10.1103/PhysRevD.95.054018.
Bodwin, Geoffrey T., Chung, Hee Sok, Ee, June-Haak, and Lee, Jungil. Thu . "New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon". United States. doi:10.1103/PhysRevD.95.054018.
@article{osti_1348048,
title = {New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon},
author = {Bodwin, Geoffrey T. and Chung, Hee Sok and Ee, June-Haak and Lee, Jungil},
abstractNote = {},
doi = {10.1103/PhysRevD.95.054018},
journal = {Physical Review D},
number = 5,
volume = 95,
place = {United States},
year = {Thu Mar 23 00:00:00 EDT 2017},
month = {Thu Mar 23 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.95.054018

Citation Metrics:
Cited by: 3works
Citation information provided by
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  • We compute the decay rates for the processes Z → V + γ , where Z is the Z -boson, γ is the photon, and V is one of the vector quarkonia J / ψ or Υ ( n S ) , with n = 1 , 2, or 3. Our computations include corrections through relative orders α s and v 2 and resummations of logarithms of mmore » $$2\atop{Z}$$/$$2\atop{Q}$$, to all orders in α s , at next-to-leading-logarithmic accuracy. ( v is the velocity of the heavy quark Q or the heavy antiquark $$\bar{Q}$$ in the quarkonium rest frame, and m Z and m Q are the masses of Z and Q , respectively.) Our calculations are the first to include both the order- α s correction to the light-cone distributions amplitude and the resummation of logarithms of m$$2\atop{Z}$$/$$2\atop{Q}$$ and are the first calculations for the Υ (2S) and Υ (3S) final states. The resummations of logarithms of m$$2\atop{Z}$$/$$2\atop{Q}$$ that are associated with the order- α s and order- v 2 corrections are carried out by making use of the Abel-Padé method. We confirm the analytic result for the order- v 2 correction that was presented in a previous publication, and we correct the relative sign of the direct and indirect amplitudes and some choices of scales in that publication. In conclusion, our branching fractions for Z → J / ψ + γ and Z → Υ (1 S) + γ differ by 2.0σ and -4.0 σ, respectively, from the branching fractions that are given in the most recent publication on this topic (in units of the uncertainties that are given in that publication). However, we argue that the uncertainties in the rates are underestimated in that publication.« less
  • We compute the decay rates for the processes Z → V + γ , where Z is the Z -boson, γ is the photon, and V is one of the vector quarkonia J / ψ or Υ ( n S ) , with n = 1 , 2, or 3. Our computations include corrections through relative orders α s and v 2 and resummations of logarithms of mmore » $$2\atop{Z}$$/$$2\atop{Q}$$, to all orders in α s , at next-to-leading-logarithmic accuracy. ( v is the velocity of the heavy quark Q or the heavy antiquark $$\bar{Q}$$ in the quarkonium rest frame, and m Z and m Q are the masses of Z and Q , respectively.) Our calculations are the first to include both the order- α s correction to the light-cone distributions amplitude and the resummation of logarithms of m$$2\atop{Z}$$/$$2\atop{Q}$$ and are the first calculations for the Υ (2S) and Υ (3S) final states. The resummations of logarithms of m$$2\atop{Z}$$/$$2\atop{Q}$$ that are associated with the order- α s and order- v 2 corrections are carried out by making use of the Abel-Padé method. We confirm the analytic result for the order- v 2 correction that was presented in a previous publication, and we correct the relative sign of the direct and indirect amplitudes and some choices of scales in that publication. In conclusion, our branching fractions for Z → J / ψ + γ and Z → Υ (1 S) + γ differ by 2.0σ and -4.0 σ, respectively, from the branching fractions that are given in the most recent publication on this topic (in units of the uncertainties that are given in that publication). However, we argue that the uncertainties in the rates are underestimated in that publication.« less
  • Future colliders will probe the electroweak theory at energies much larger than the gauge boson masses. Large double (DL) and single (SL) logarithmic virtual electroweak Sudakov corrections lead to significant effects for observable cross sections. Recently, leading and subleading universal corrections for external fermions and transverse gauge boson lines were resummed by employing the infrared evolution equation method. The results were confirmed at the DL level by explicit two loop calculations with the physical standard model (SM) fields. Also for longitudinal degrees of freedom the approach was utilized for DL corrections via the Goldstone boson equivalence theorem. In all cases,more » the electroweak Sudakov logarithms exponentiate. In this paper we extend the same approach to both Yukawa enhanced as well as subleading Sudakov corrections to longitudinal gauge boson and Higgs production. We use virtual contributions to splitting functions of the appropriate Goldstone bosons in the high energy regime and find that all universal subleading terms exponentiate. The approach is verified by employing a non-Abelian version of Gribov{close_quote}s factorization theorem and by explicit comparison with existing one loop calculations. As a side result, we obtain also all top-Yukawa enhanced subleading logarithms for chiral fermion production at high energies to all orders. In all cases, the size of the subleading contributions at the two loop level is non-negligible in the context of precision measurements at future linear colliders.« less