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Title: Model-independent analysis of semileptonic B decays to D * * for arbitrary new physics

Abstract

We explore semileptonic B decays to the four lightest excited charm mesons, D**={D0*,D1*,D1,D2*}, for nonzero charged lepton mass and for all b → cℓ$$\bar{\nu }$$ four-Fermi interactions, including calculation of the O(ΛQCD/mc,b) and O(αs) corrections to the heavy quark limit for all form factors. In the heavy quark limit, some form factors are suppressed at zero recoil; therefore, the O(ΛQCD/mc,b) corrections can be very important. The D** rates exhibit sensitivities to new physics in b → cτ$$\bar{\nu }$$ mediated decays complementary to the D and D* modes. Since they are also important backgrounds to B→D(∗)τ$$\bar{\nu }$$, the correct interpretation of future semitauonic B→D(∗) rate measurements requires consistent treatment of both the D** backgrounds and the signals. Our results allow more precise and more reliable calculations of these B→D**ℓ$$\bar{\nu }$$ decays and are systematically improvable by better data on the e and μ modes. As an example, we show that the D** rates are more sensitive to a new $$\bar{c}$$ σμνb tensor interaction than the D(∗) rates.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1432900
Alternate Identifier(s):
OSTI ID: 1462969
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 97 Journal Issue: 7; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Bernlochner, Florian U., Ligeti, Zoltan, and Robinson, Dean J. Model-independent analysis of semileptonic B decays to D * * for arbitrary new physics. United States: N. p., 2018. Web. https://doi.org/10.1103/PhysRevD.97.075011.
Bernlochner, Florian U., Ligeti, Zoltan, & Robinson, Dean J. Model-independent analysis of semileptonic B decays to D * * for arbitrary new physics. United States. https://doi.org/10.1103/PhysRevD.97.075011
Bernlochner, Florian U., Ligeti, Zoltan, and Robinson, Dean J. Thu . "Model-independent analysis of semileptonic B decays to D * * for arbitrary new physics". United States. https://doi.org/10.1103/PhysRevD.97.075011.
@article{osti_1432900,
title = {Model-independent analysis of semileptonic B decays to D * * for arbitrary new physics},
author = {Bernlochner, Florian U. and Ligeti, Zoltan and Robinson, Dean J.},
abstractNote = {We explore semileptonic B decays to the four lightest excited charm mesons, D**={D0*,D1*,D1,D2*}, for nonzero charged lepton mass and for all b → cℓ$\bar{\nu }$ four-Fermi interactions, including calculation of the O(ΛQCD/mc,b) and O(αs) corrections to the heavy quark limit for all form factors. In the heavy quark limit, some form factors are suppressed at zero recoil; therefore, the O(ΛQCD/mc,b) corrections can be very important. The D** rates exhibit sensitivities to new physics in b → cτ$\bar{\nu }$ mediated decays complementary to the D and D* modes. Since they are also important backgrounds to B→D(∗)τ$\bar{\nu }$, the correct interpretation of future semitauonic B→D(∗) rate measurements requires consistent treatment of both the D** backgrounds and the signals. Our results allow more precise and more reliable calculations of these B→D**ℓ$\bar{\nu }$ decays and are systematically improvable by better data on the e and μ modes. As an example, we show that the D** rates are more sensitive to a new $\bar{c}$ σμνb tensor interaction than the D(∗) rates.},
doi = {10.1103/PhysRevD.97.075011},
journal = {Physical Review D},
number = 7,
volume = 97,
place = {United States},
year = {2018},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevD.97.075011

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Cited by: 5 works
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    Works referencing / citing this record:

    Review of lepton universality tests in B decays
    journal, December 2018

    • Bifani, Simone; Descotes-Genon, Sébastien; Vidal, Antonio Romero
    • Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 2
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    B T transition form factors in light-cone sum rules
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