Precision Global Determination of the B → X s γ Decay Rate

Bernlochner, Florian U.; Lacker, Heiko; Ligeti, Zoltan; Stewart, Iain W.; Tackmann, Frank J.; Tackmann, Kerstin

doi:10.1103/PhysRevLett.127.102001

Title: Precision Global Determination of the $B \to X_{s} γ$ Decay Rate

Abstract

We perform the first global fit to inclusive $B \to X_{s} γ$ measurements using a model-independent treatment of the nonperturbative $b$ -quark distribution function, with next-to-next-to-leading logarithmic resummation and $O (α_{s}^{2})$ fixed-order contributions. The normalization of the $B \to X_{s} γ$ decay rate, given by $| C_{7}^{incl} V_{t b} V_{t s}^{*} |^{2}$ , is sensitive to physics beyond the standard model (SM). We determine $| C_{7}^{incl} V_{t b} V_{t s}^{*} | = (14.77 \pm 0.5 1_{fit} \pm 0.5 9_{theory} \pm 0.0 8_{param}) \times 10^{- 3}$ , in good agreement with the SM prediction, and the $b$ -quark mass $m_{b}^{1 S} = (4.750 \pm 0.02 7_{fit} \pm 0.03 3_{theory} \pm 0.00 3_{param}) GeV$ . Our results suggest that the uncertainties in the extracted $B \to X_{s} γ$ rate have been underestimated by up to a factor of 2, leaving more room for beyond-SM contributions.

Authors:

Bernlochner, Florian U.;

;

; Tackmann, Frank J.;

; SIMBA Collaboration

Publication Date:: Tue Aug 31 00:00:00 EDT 2021

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Simons Foundation; German Research Foundation (DFG); Helmholtz Association

Contributing Org.:: SIMBA Collaboration

OSTI Identifier:: 1817929

Alternate Identifier(s):: OSTI ID: 1825261

Grant/Contract Number:: AC02-05CH11231; SC0011090; PHY-1607611; TA 867/1-1; BE 6075/1-1; W2/W3-116

Resource Type:: Published Article

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Name: Physical Review Letters Journal Volume: 127 Journal Issue: 10; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Flavor changing neutral currents; Heavy quark effective theory; Leptonic, semileptonic & radiative decays; Perturbative QCDRare decays

Citation Formats


                    Bernlochner, Florian U., Lacker, Heiko, Ligeti, Zoltan, Stewart, Iain W., Tackmann, Frank J., Tackmann, Kerstin, and SIMBA Collaboration. Precision Global Determination of the B → X s γ Decay Rate.  United States: N. p., 2021. 
Web.  doi:10.1103/PhysRevLett.127.102001.

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                    Bernlochner, Florian U., Lacker, Heiko, Ligeti, Zoltan, Stewart, Iain W., Tackmann, Frank J., Tackmann, Kerstin, & SIMBA Collaboration. Precision Global Determination of the B → X s γ Decay Rate.  United States.  https://doi.org/10.1103/PhysRevLett.127.102001

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                    Bernlochner, Florian U., Lacker, Heiko, Ligeti, Zoltan, Stewart, Iain W., Tackmann, Frank J., Tackmann, Kerstin, and SIMBA Collaboration. Tue .  
"Precision Global Determination of the B → X s γ Decay Rate".  United States.  https://doi.org/10.1103/PhysRevLett.127.102001.

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@article{osti_1817929,

  title        = {Precision Global Determination of the B → X s γ Decay Rate},

  author       = {Bernlochner, Florian U. and Lacker, Heiko and Ligeti, Zoltan and Stewart, Iain W. and Tackmann, Frank J. and Tackmann, Kerstin and SIMBA Collaboration},

  abstractNote = {We perform the first global fit to inclusive B→Xsγ measurements using a model-independent treatment of the nonperturbative b-quark distribution function, with next-to-next-to-leading logarithmic resummation and O(αs2) fixed-order contributions. The normalization of the B→Xsγ decay rate, given by |C7inclVtbVts*|2, is sensitive to physics beyond the standard model (SM). We determine |C7inclVtbVts*|=(14.77±0.51fit±0.59theory±0.08param)×10-3, in good agreement with the SM prediction, and the b-quark mass mb1S=(4.750±0.027fit±0.033theory±0.003param) GeV. Our results suggest that the uncertainties in the extracted B→Xsγ rate have been underestimated by up to a factor of 2, leaving more room for beyond-SM contributions.},

  doi          = {10.1103/PhysRevLett.127.102001},

  journal      = {Physical Review Letters},

  number       = 10,

  volume       = 127,

  place        = {United States},

  year         = {Tue Aug 31 00:00:00 EDT 2021},

  month        = {Tue Aug 31 00:00:00 EDT 2021}

}

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Title: Precision Global Determination of the B → X s γ Decay Rate

Abstract

Citation Formats

Virtual O ( α s ) corrections to the inclusive decay b → s γ journal, September 1996

Anomalous dimension matrix for radiative and rare semileptonic B decays up to three loops journal, November 2003

Analysis of the photon spectrum in inclusive B → X s γ decays journal, May 1994

Inclusive semileptonic B decays and the determination of | V ub | journal, October 2007

The ΔS = 1 effective hamiltonian including next-to-leading order QCD and QED corrections journal, March 1994

On the quark distribution in an on-shell heavy quark and its all-order relations with the perturbative fragmentation function journal, February 2005

Moments of the photon spectrum in the inclusive B → Xsγ decay journal, July 1995

Erratum: Corrections to moments of the photon spectrum in the inclusive decay B → X s γ [Phys. Rev. D 57, 5611 (1998)] journal, October 1999

Extracting short distance information from b → s ℓ + ℓ − effectively journal, February 2007

Comment on nonperturbative effects in journal, June 1997

Averages of b-hadron, c-hadron, and $$\tau $$-lepton properties as of 2018: Heavy Flavor Averaging Group (HFLAV) journal, March 2021

Fermionic corrections to the interference of the electro- and chromomagnetic dipole operators in B¯→Xsγ at O(αs2) journal, November 2008

Shape-function effects and split matching in B → X s ℓ + ℓ − journal, July 2006

Complete ( O 7 , O 8 ) contribution to B ¯ → X s γ at O ( α s 2 ) journal, October 2010

Completing the calculation of Brodsky-Lepage-Mackenzie corrections to B ¯ → X s γ journal, January 2011

An effective field theory for collinear and soft gluons: Heavy to light decays journal, May 2001

Magnetic dipole operator contributions to the photon energy spectrum in at journal, January 2007

Inclusive photon energy spectrum in rareB decays journal, September 1991

On the Motion of Heavy Quarks Inside Hadrons: Universal Distributions and Inclusive Decays journal, June 1994

Enhanced nonlocal power corrections to the B ¯ → X s γ decay rate journal, June 2007

Three-Loop Mixing of Dipole Operators journal, September 2005

Top-quark pair production close to threshold: Top-quark mass, width, and momentum distribution journal, November 1999

Top jets in the peak region: Factorization analysis with next-to-leading-log resummation journal, June 2008

Effective hamiltonian for weak radiative B-meson decay journal, February 1988

Measurement of Inclusive Radiative B -Meson Decays with a Photon Energy Threshold of 1.7 GeV journal, December 2009

On the photon energy moments and their ‘bias’ corrections in journal, March 2005

Effective Hamiltonian for non-leptonic decays at NNLO in QCD journal, May 2005

Review of Particle Physics journal, August 2018

Leading logarithms of the b quark mass in inclusive B → Xs γ decay journal, September 1995

Estimate of B ( B ¯ → X s γ ) at O ( α s 2 ) journal, January 2007

Measurement of the B → X s γ branching fraction and photon energy spectrum using the recoil method journal, March 2008

Large- asymptotic behaviour of the corrections to journal, November 2010

Three-loop chromomagnetic interaction in HQET journal, January 2008

Factorization at subleading power and irreducible uncertainties in $ \bar{B} \to {X_s}\gamma $ decay journal, August 2010

Photon energy spectrum in B → XS + γ and comparison with data journal, November 1995

Updated Next-to-Next-to-Leading-Order QCD Predictions for the Weak Radiative B -Meson Decays journal, June 2015

Weak radiative B-meson decay as a probe of the Higgs sector journal, February 1988

Reevaluating uncertainties in B¯$$ \overline{B} $$→ Xsγ decay journal, November 2019

Four-loop anomalous dimensions for radiative flavour-changing decays journal, March 2007

B decays in the upsilon expansion journal, March 1999

Photonic penguins at two loops and m-dependence of BR[B→Xl+l−] journal, May 2000

Two-loop anomalous dimension matrix for ΔS = 1 weak non-leptonic decays (I). O(α2s) journal, July 1993

Resolved 1 / m b contributions to B ¯ → X s , d ℓ + ℓ − and B ¯ → X s γ journal, December 2020

Weak decays beyond leading logarithms journal, October 1996

Weak radiative B-meson decay beyond leading logarithms [Phys. Lett. B 400 (1997) 206] journal, April 1998

The photon energy spectrum in B→Xs+γ in perturbative QCD through O(αs2) journal, July 2005

Invariant operators in collinear effective theory journal, September 2001

Summing Sudakov logarithms in B → X s γ in effective field theory journal, December 2000

Full-phase-space twist expansion in semileptonic and radiative B -meson decays journal, August 2005

Inclusive measure of |V ub | with the analytic coupling model journal, December 2008

A profile of the final states in B→Xs+γ and an estimate of the branching ratio journal, April 1991

Effects of charged Higgs bosons on the processes b→sγ, b→sg∗ and b→sℓ+ℓ− journal, March 1988

Renormalization-group improved calculation of the $B\to X_s\gamma$ branching ratio journal, March 2005

NNLO QCD corrections to the matrix elements using interpolation in journal, February 2007

QCD enhancement of radiative B decays journal, July 1987

Weak radiative decays of the B meson and bounds on $$M_{H^\pm }$$ M H ± in the Two-Higgs-Doublet Model journal, March 2017

Completing the NLO QCD calculation of journal, June 2002

Partonic distributions for large x and renormalization of Wilson loop journal, September 1993

Electromagnetic dipole operator effect on B ¯ → X s γ at O ( α s 2 ) journal, August 2005

Evolution of the light-cone distribution function for a heavy quark journal, November 1998

Remarks on nonperturbative O ( 1 / m c 2 ) corrections to Γ ( B ¯ → X s γ ) journal, September 1997

Shape function effects in B → X s γ and B → X u l ν ¯ decays journal, August 2004

Thrust at N 3 LL with power corrections and a precision global fit for α s ( m Z ) journal, April 2011

Bremsstrahlung corrections to the decay b → s γ journal, July 1996

B decay shape variables and the precision determination of | V cb | and m b journal, March 2003

The (Q7, Q1,2) contribution to B ¯ → X s γ $$ \overline{B}\to {X}_s\gamma $$ at O α s 2 $$ \mathcal{O}\left({\alpha}_{\mathrm{s}}^2\right) $$ journal, April 2015

Order 1 / m b 3 corrections to B → X c l ν ¯ decay and their implication for the measurement of Λ ¯ and λ 1 journal, June 1997

RunDec: a Mathematica package for running and decoupling of the strong coupling and quark masses journal, December 2000

Theory of charmless inclusive B decays and the extraction of V u b journal, October 2005

Three-loop matching of the dipole operators for b→sγ and b→sg journal, April 2004

R evolution: Improving perturbative QCD journal, July 2010

The B ¯ → X s γ photon spectrum journal, July 1999

Infrared Renormalization-Group Flow for Heavy-Quark Masses journal, October 2008

Measurement of B ( B → X s γ ), the B → X s γ photon energy spectrum, and the direct C P asymmetry in B → X s + d γ decays journal, December 2012

Charm quark mass dependence of the electromagnetic dipole operator contribution to B¯→Xsγ at O(αs2) journal, April 2007

B Decay and the ϒ Mass journal, January 1999

Exclusive measurements of b → s γ transition rate and photon energy spectrum journal, September 2012

Title: Precision Global Determination of the $B \to X_{s} γ$ Decay Rate

Virtual $O (α_{s})$ corrections to the inclusive decay $b \to s γ$
journal, September 1996

Anomalous dimension matrix for radiative and rare semileptonic B decays up to three loops
journal, November 2003

Analysis of the photon spectrum in inclusive $B \to X_{s} γ$ decays
journal, May 1994

Inclusive semileptonic B decays and the determination of | V _ub |
journal, October 2007

The ΔS = 1 effective hamiltonian including next-to-leading order QCD and QED corrections
journal, March 1994

On the quark distribution in an on-shell heavy quark and its all-order relations with the perturbative fragmentation function
journal, February 2005

Moments of the photon spectrum in the inclusive B → Xsγ decay
journal, July 1995

Erratum: Corrections to moments of the photon spectrum in the inclusive decay $B \to X_{s} γ$ [Phys. Rev. D 57, 5611 (1998)]
journal, October 1999

Extracting short distance information from $b \to s ℓ^{+} ℓ^{-}$ effectively
journal, February 2007

Comment on nonperturbative effects in
journal, June 1997

Averages of b-hadron, c-hadron, and $$\tau $$-lepton properties as of 2018: Heavy Flavor Averaging Group (HFLAV)
journal, March 2021

Fermionic corrections to the interference of the electro- and chromomagnetic dipole operators in B¯→Xsγ at O(αs2)
journal, November 2008

Shape-function effects and split matching in $B \to X_{s} ℓ^{+} ℓ^{-}$
journal, July 2006

Complete $(O_{7}, O_{8})$ contribution to $\bar{B} \to X_{s} γ$ at $O (α_{s}^{2})$
journal, October 2010

Completing the calculation of Brodsky-Lepage-Mackenzie corrections to $\bar{B} \to X_{s γ}$
journal, January 2011

An effective field theory for collinear and soft gluons: Heavy to light decays
journal, May 2001

Magnetic dipole operator contributions to the photon energy spectrum in at
journal, January 2007

Inclusive photon energy spectrum in rareB decays
journal, September 1991

On the Motion of Heavy Quarks Inside Hadrons: Universal Distributions and Inclusive Decays
journal, June 1994

Enhanced nonlocal power corrections to the $\bar{B} \to X_{s} γ$ decay rate
journal, June 2007

Three-Loop Mixing of Dipole Operators
journal, September 2005

Top-quark pair production close to threshold: Top-quark mass, width, and momentum distribution
journal, November 1999

Top jets in the peak region: Factorization analysis with next-to-leading-log resummation
journal, June 2008

Effective hamiltonian for weak radiative B-meson decay
journal, February 1988

Measurement of Inclusive Radiative $B$ -Meson Decays with a Photon Energy Threshold of 1.7 GeV
journal, December 2009

On the photon energy moments and their ‘bias’ corrections in
journal, March 2005

Effective Hamiltonian for non-leptonic decays at NNLO in QCD
journal, May 2005

Review of Particle Physics
journal, August 2018

Leading logarithms of the b quark mass in inclusive B → Xs γ decay
journal, September 1995

Estimate of $B (\bar{B} \to X_{s} γ)$ at $O (α_{s}^{2})$
journal, January 2007

Measurement of the $B \to X_{s} γ$ branching fraction and photon energy spectrum using the recoil method
journal, March 2008

Large- asymptotic behaviour of the corrections to
journal, November 2010

Three-loop chromomagnetic interaction in HQET
journal, January 2008

Factorization at subleading power and irreducible uncertainties in $ \bar{B} \to {X_s}\gamma $ decay
journal, August 2010

Photon energy spectrum in B → XS + γ and comparison with data
journal, November 1995

Updated Next-to-Next-to-Leading-Order QCD Predictions for the Weak Radiative $B$ -Meson Decays
journal, June 2015

Weak radiative B-meson decay as a probe of the Higgs sector
journal, February 1988

Reevaluating uncertainties in B¯$$ \overline{B} $$→ Xsγ decay
journal, November 2019

Four-loop anomalous dimensions for radiative flavour-changing decays
journal, March 2007

$B$ decays in the upsilon expansion
journal, March 1999

Photonic penguins at two loops and m-dependence of BR[B→Xl+l−]
journal, May 2000

Two-loop anomalous dimension matrix for ΔS = 1 weak non-leptonic decays (I). O(α2s)
journal, July 1993

Resolved $1 / m_{b}$ contributions to $\bar{B} \to X_{s, d} ℓ^{+} ℓ^{-}$ and $\bar{B} \to X_{s} γ$
journal, December 2020

Weak decays beyond leading logarithms
journal, October 1996

Weak radiative B-meson decay beyond leading logarithms [Phys. Lett. B 400 (1997) 206]
journal, April 1998

The photon energy spectrum in B→Xs+γ in perturbative QCD through O(αs2)
journal, July 2005

Invariant operators in collinear effective theory
journal, September 2001

Summing Sudakov logarithms in $\vec{B} X_{s} γ$ in effective field theory
journal, December 2000

Full-phase-space twist expansion in semileptonic and radiative $B$ -meson decays
journal, August 2005

Inclusive measure of |V ub | with the analytic coupling model
journal, December 2008

A profile of the final states in B→Xs+γ and an estimate of the branching ratio
journal, April 1991

Effects of charged Higgs bosons on the processes b→sγ, b→sg∗ and b→sℓ+ℓ−
journal, March 1988

Renormalization-group improved calculation of the $B\to X_s\gamma$ branching ratio
journal, March 2005

NNLO QCD corrections to the matrix elements using interpolation in
journal, February 2007

QCD enhancement of radiative B decays
journal, July 1987

Weak radiative decays of the B meson and bounds on $$M_{H^\pm }$$ M H ± in the Two-Higgs-Doublet Model
journal, March 2017

Completing the NLO QCD calculation of
journal, June 2002

Partonic distributions for large x and renormalization of Wilson loop
journal, September 1993

Electromagnetic dipole operator effect on $\bar{B} \to X_{s} γ$ at $O (α_{s}^{2})$
journal, August 2005

Evolution of the light-cone distribution function for a heavy quark
journal, November 1998

Remarks on nonperturbative ${O (1 / m}_{c}^{2})$ corrections to $Γ (\bar{B} \to X_{s} γ)$
journal, September 1997

Shape function effects in $\vec{B} X_{s} γ$ and $\vec{B} X_{u} l \bar{ν}$ decays
journal, August 2004

Thrust at $N^{3} LL$ with power corrections and a precision global fit for $α_{s} (m_{Z})$
journal, April 2011

Bremsstrahlung corrections to the decay $b \to s γ$
journal, July 1996

$B$ decay shape variables and the precision determination of $| V_{cb} |$ and $m_{b}$
journal, March 2003

The (Q7, Q1,2) contribution to B ¯ → X s γ $$ \overline{B}\to {X}_s\gamma $$ at O α s 2 $$ \mathcal{O}\left({\alpha}_{\mathrm{s}}^2\right) $$
journal, April 2015

Order ${1 / m}_{b}^{3}$ corrections to $B \to X_{c} l \bar{ν}$ decay and their implication for the measurement of $\bar{Λ}$ and $λ_{1}$
journal, June 1997

RunDec: a Mathematica package for running and decoupling of the strong coupling and quark masses
journal, December 2000

Theory of charmless inclusive $B$ decays and the extraction of $V_{u b}$
journal, October 2005

Three-loop matching of the dipole operators for b→sγ and b→sg
journal, April 2004

$R$ evolution: Improving perturbative QCD
journal, July 2010

The $\bar{B} \to X_{s} γ$ photon spectrum
journal, July 1999

Infrared Renormalization-Group Flow for Heavy-Quark Masses
journal, October 2008

Measurement of $B$ ( $B \to X_{s} γ$ ), the $B \to X_{s} γ$ photon energy spectrum, and the direct $C P$ asymmetry in $B \to X_{s + d} γ$ decays
journal, December 2012

Charm quark mass dependence of the electromagnetic dipole operator contribution to B¯→Xsγ at O(αs2)
journal, April 2007

$B$ Decay and the $ϒ$ Mass
journal, January 1999

Exclusive measurements of $b \to s γ$ transition rate and photon energy spectrum
journal, September 2012

Large O(mc−2) nonperturbative corrections to the inclusive rate of the decay B → Xsγ
journal, April 1997

Factorization for power corrections to and
journal, August 2005