Asymmetry observables and the origin of R D ( * ) anomalies

Asadi, Pouya; Buckley, Matthew R.; Shih, David

doi:10.1103/PhysRevD.99.035015

Title: Asymmetry observables and the origin of $R_{D^{(*)}}$ anomalies

Abstract

The R_D(*) anomalies are among the longest-standing and most statistically significant hints of physics beyond the standard model. Many models have been proposed to explain these anomalies, including the interesting possibility that right-handed neutrinos could be involved in the B decays. In this paper, we investigate future measurements at Belle II that can be used to tell apart the various new physics scenarios. Focusing on a number of τ asymmetry observables (forward-backward asymmetry and polarization asymmetries) which can be reconstructed at Belle II, we calculate the contribution of the most general dimension 6 effective Hamiltonian (including right-handed neutrinos) to all of these asymmetries. We show that Belle II can use these asymmetries to distinguish between new-physics scenarios that use right- and left-handed neutrinos, and in most cases can likely distinguish the specific model itself.

Authors:: Asadi, Pouya; Buckley, Matthew R.; Shih, David

Publication Date:: Tue Feb 12 00:00:00 EST 2019

Research Org.:: Rutgers Univ., Piscataway, NJ (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1494381

Alternate Identifier(s):: OSTI ID: 1611325

Grant/Contract Number:: DOE-SC0010008; SC0017811; SC0010008

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: Journal Name: Physical Review D Journal Volume: 99 Journal Issue: 3; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Astronomy & Astrophysics; Physics; Leptonic, semileptonic & radiative decays; Particle decays; Bottom mesons; Hypothetical gauge bosons; Leptoquarks

Citation Formats


                    Asadi, Pouya, Buckley, Matthew R., and Shih, David. Asymmetry observables and the origin of R D ( * ) anomalies.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevD.99.035015.

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                    Asadi, Pouya, Buckley, Matthew R., & Shih, David. Asymmetry observables and the origin of R D ( * ) anomalies.  United States.  https://doi.org/10.1103/PhysRevD.99.035015

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                    Asadi, Pouya, Buckley, Matthew R., and Shih, David. Tue .  
"Asymmetry observables and the origin of R D ( * ) anomalies".  United States.  https://doi.org/10.1103/PhysRevD.99.035015.

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@article{osti_1494381,

  title        = {Asymmetry observables and the origin of R D ( * ) anomalies},

  author       = {Asadi, Pouya and Buckley, Matthew R. and Shih, David},

  abstractNote = {The RD(*) anomalies are among the longest-standing and most statistically significant hints of physics beyond the standard model. Many models have been proposed to explain these anomalies, including the interesting possibility that right-handed neutrinos could be involved in the B decays. In this paper, we investigate future measurements at Belle II that can be used to tell apart the various new physics scenarios. Focusing on a number of τ asymmetry observables (forward-backward asymmetry and polarization asymmetries) which can be reconstructed at Belle II, we calculate the contribution of the most general dimension 6 effective Hamiltonian (including right-handed neutrinos) to all of these asymmetries. We show that Belle II can use these asymmetries to distinguish between new-physics scenarios that use right- and left-handed neutrinos, and in most cases can likely distinguish the specific model itself.},

  doi          = {10.1103/PhysRevD.99.035015},

  journal      = {Physical Review D},

  number       = 3,

  volume       = 99,

  place        = {United States},

  year         = {Tue Feb 12 00:00:00 EST 2019},

  month        = {Tue Feb 12 00:00:00 EST 2019}

}

Copy to clipboard

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Semileptonic flavor-changing neutral-current transitions with a pair of neutrinos in the final state are very accurately determined in the Standard Model (SM) and thus provide an accurate and sensitive probe for physics beyond the SM. Until recently, the poor tagging efficiency for themore »« less
https://doi.org/10.1103/PhysRevD.104.053007
$Z^{}$ -portal right-handed neutrino dark matter in the minimal ${U (1)}_{X}$ extended Standard Model

Journal Article Okada, Nobuchika ; Okada, Satomi - Physical Review D

We consider a concise dark matter (DM) scenario in the context of a non-exotic U(1) extension of the Standard Model (SM), where a new U(1)_X gauge symmetry is introduced along with three generation of right-handed neutrinos (RHNs) and an SM gauge singlet Higgs field. The model is a generalization of the minimal gauged U(1)_B-L (baryon number minus lepton number) extension of the SM, in which the extra U(1)_X gauge symmetry is expressed as a linear combination of the SM U(1)_Y and U(1)_B-L gauge symmetries. We introduce a Z₂-parity and assign an odd-parity only for one RHN among all particles, somore »« less
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https://doi.org/10.1103/PhysRevD.95.035025

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Title: Asymmetry observables and the origin of R D ( * ) anomalies

Abstract

Citation Formats

Test of lepton universality with B 0 → K *0 ℓ + ℓ − decays journal, August 2017

Constraints on the charged scalar effects using the forward-backward asymmetry on B ¯ → D ( * ) τ ν ¯ τ journal, March 2013

New strategies for new physics search in B → K *νν̄, B → K νν̄ and B → X s νν̄ decays journal, April 2009

Leptoquark model to explain the B -physics anomalies, R K and R D journal, December 2016

B → D τ ν branching ratios: Opportunity for lattice QCD and hadron colliders journal, July 2008

Lifetime of B c − Mesons Constrains Explanations for Anomalies in B → D ( * ) τ ν journal, February 2017

Erratum: B → D l ν form factors at nonzero recoil and extraction of | V c b | [Phys. Rev. D 92 , 054510 (2015)] journal, June 2016

New physics solutions for RD and RD∗ journal, September 2018

R D ( * ) anomaly: A possible hint for natural supersymmetry with R -parity violation journal, November 2017

Footprints of new physics in b → c τ ν transitions journal, November 2018

Dispersive bounds on the shape of form factors journal, October 1998

Measurement of the branching ratio of B ¯ → D ( * ) τ − ν ¯ τ relative to B ¯ → D ( * ) ℓ − ν ¯ ℓ decays with hadronic tagging at Belle journal, October 2015

Pati-Salam explanations of the B-meson anomalies journal, December 2018

Measurement of the Ratio of Branching Fractions B ( B c + → J / ψ τ + ν τ ) / B ( B c + → J / ψ μ + ν μ ) journal, March 2018

Revisiting the one leptoquark solution to the R(D (∗)) anomalies and its phenomenological implications journal, August 2016

The full $ B\to {D^{*}}{\tau^{-}}{{\overline{v}}_{\tau }} $ angular distribution and CP violating triple products journal, September 2013

B anomalies and leptoquarks at the LHC: Beyond the lepton-quark final state journal, December 2018

Combined explanations of B-physics anomalies: the sterile neutrino solution journal, October 2018

First limit on inclusive decay and constraints on new physics journal, April 1996

Minimally flavored colored scalar in $ \overline{B}\to {D^{{\left( * \right)}}}\tau \overline{\nu} $ and the mass matrices constraints journal, November 2013

Diagnosing new physics in b → c τ ν τ decays in the light of the recent BABAR result journal, August 2012

LHC constraints and prospects for S 1 scalar leptoquark explaining the B ¯ → D ( * ) τ ν ¯ anomaly journal, August 2016

Evidence for an Excess of B ¯ → D ( * ) τ − ν ¯ τ Decays journal, September 2012

Exclusive decays B → ℓ − ν ¯ and B → D ( * ) ℓ − ν ¯ in the covariant quark model journal, December 2015

Anatomy of b → c τ ν anomalies journal, November 2018

Tau longitudinal polarization in B ¯ → D τ ν ¯ and its role in the search for the charged Higgs boson journal, August 2010

Observation of the Semileptonic Decays B → D * τ − ν ¯ τ and Evidence for B → D τ − ν ¯ τ journal, January 2008

B → D l ν form factors at nonzero recoil and extraction of | V c b | journal, September 2015

B decays with τ leptons in nonuniversal left-right models journal, January 2013

On the breaking of lepton flavor universality in B decays journal, July 2015

Analyzing new physics in the decays B ¯ 0 → D ( * ) τ − ν ¯ τ with form factors obtained from the covariant quark model journal, November 2016

Confronting lepton flavor universality violation in B decays with high- p T tau lepton searches at LHC journal, January 2017

Search for B → h ν ν ¯ decays with semileptonic tagging at Belle journal, November 2017

B → D * τ ν ¯ τ sensitivity to new physics journal, May 2012

Scalar doublet models confront τ and b anomalies journal, April 2016

New physics in the kinematic distributions of B ¯ → D ( * ) τ − ( → ℓ − ν ¯ ℓ ν τ ) ν ¯ τ journal, November 2016

Combined explanations of the b → s μ + μ − and b → c τ − ν ¯ anomalies: A general model analysis journal, January 2019

Weak form factors for heavy meson decays: An update journal, May 2000

Measurements of BR(b $\to \tau^- \bar{\nu}_{\tau}$ X) and BR(b $\to \tau^- \bar{\nu}_{\tau}{\mathrm D}^{\ast\pm}$ X) and upper limits on BR(B $^- \to \tau^- \bar{\nu}_{\tau})$ and BR(b $\to{\mathrm s} \nu \bar{\nu})$ journal, February 2001

A closer look at the R D and R D* anomalies journal, January 2017

First limit on inclusive B → X η, decay and constraints on new physics [Nucl. Phys. B 465 (1996) 369] journal, December 1996

Closing the window on single leptoquark solutions to the B-physics anomalies journal, October 2018

Probing a simplified W ′ model of R ( D ( * ) ) anomalies using b tags, τ leptons, and missing energy journal, September 2018

Exclusive semileptonic B-meson decays journal, December 1989

Observation of B + → D ¯ * 0 τ + ν τ and evidence for B + → D ¯ 0 τ + ν τ at Belle journal, October 2010

It’s all right(-handed neutrinos): a new W ′ model for the R D ∗ $$ {R}_{D^{{}_{\left(\ast \right)}}} $$ anomaly journal, September 2018

b → ( c , u ) τ ν leptonic and semileptonic decays within an effective field theory approach journal, August 2017

Measurement of an excess of B ¯ → D ( * ) τ − ν ¯ τ decays and implications for charged Higgs bosons journal, October 2013

Measurement of the τ Lepton Polarization and R ( D * ) in the Decay B ¯ → D * τ − ν ¯ τ journal, May 2017

Measurement of the Ratio of Branching Fractions B ( B ¯ 0 → D * + τ − ν ¯ τ ) / B ( B ¯ 0 → D * + μ − ν ¯ μ ) journal, September 2015

Charged Higgs effects on exclusive semi-tauonicB decays journal, June 1995

Resolution of R/ R D ⁎ puzzle journal, September 2018

R D * $$ {R}_{D^{\left(*\right)}} $$ in custodial warped space journal, December 2018

Review of lattice results concerning low-energy particle physics: Flavour Lattice Averaging Group (FLAG) journal, February 2017

Measurement of the τ lepton polarization and R ( D * ) in the decay B ¯ → D * τ − ν ¯ τ with one-prong hadronic τ decays at Belle journal, January 2018

Refining New-Physics Searches in B → D τ ν with Lattice QCD journal, August 2012

Scalar contributions to b→c(u)τν transitions journal, August 2017

D * polarization as a probe to discriminate new physics in B ¯ → D * τ ν ¯ journal, June 2017

New physics in the weak interaction of B ¯ → D ( * ) τ ν ¯ journal, February 2013

Effective theory approach to new physics in b → u and b → c leptonic and semileptonic decays journal, December 2013

Testing leptoquark models in B ¯ → D ( * ) τ ν ¯ journal, November 2013

Publisher’s Note: Measurement of the Ratio of Branching Fractions B ( B ¯ 0 → D * + τ − ν ¯ τ ) / B ( B ¯ 0 → D * + μ − ν ¯ μ ) [Phys. Rev. Lett. 115 , 111803 (2015)] journal, October 2015

R(D(∗)) from W ′ and right-handed neutrinos journal, September 2018

Probing new physics with q 2 distributions in B ¯ → D ( * ) τ ν ¯ journal, June 2015

Probing new physics in B ¯ 0 → D ( * ) τ − ν ¯ τ using the longitudinal, transverse, and normal polarization components of the tau lepton journal, February 2017

Constraint on the branching ratio of B c − → τ ν ¯ from LEP1 data and consequences for R ( D ( * ) ) anomaly journal, October 2017

Status of the semileptonic B decays and muon g-2 in general 2HDMs with right-handed neutrinos journal, May 2018

Tau properties in B → D τ ν from visible final-state kinematics journal, May 2017

Publisher’s Note: Search for B → h ν ν ¯ decays with semileptonic tagging at Belle [Phys. Rev. D 96 , 091101(R) (2017)] journal, May 2018

Flavor models for B ¯ → D ( * ) τ ν ¯ journal, September 2015

Physics of leptoquarks in precision experiments and at particle colliders journal, June 2016

Extraction of |Vcb| from B → D(∗)ℓνℓ and the Standard Model predictions of R(D(∗)) journal, December 2017

B → D ℓ ν form factors at nonzero recoil and | V c b | from 2 + 1 -flavor lattice QCD journal, August 2015

Averages of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties as of summer 2016 journal, December 2017

Title: Asymmetry observables and the origin of $R_{D^{(*)}}$ anomalies

Test of lepton universality with B 0 → K *0 ℓ + ℓ − decays
journal, August 2017

Constraints on the charged scalar effects using the forward-backward asymmetry on $\bar{B} \to D^{(*)} τ {\bar{ν}}_{τ}$
journal, March 2013

New strategies for new physics search in B → K *νν̄, B → K νν̄ and B → X _s νν̄ decays
journal, April 2009

Leptoquark model to explain the $B$ -physics anomalies, $R_{K}$ and $R_{D}$
journal, December 2016

$B \to D τ ν$ branching ratios: Opportunity for lattice QCD and hadron colliders
journal, July 2008

Lifetime of $B_{c}^{-}$ Mesons Constrains Explanations for Anomalies in $B \to D^{(*)} τ ν$
journal, February 2017

Erratum: $B \to D l ν$ form factors at nonzero recoil and extraction of $| V_{c b} |$ [Phys. Rev. D 92 , 054510 (2015)]
journal, June 2016

New physics solutions for RD and RD∗
journal, September 2018

$R_{D^{(*)}}$ anomaly: A possible hint for natural supersymmetry with $R$ -parity violation
journal, November 2017

Footprints of new physics in $b \to c τ ν$ transitions
journal, November 2018

Dispersive bounds on the shape of form factors
journal, October 1998

Measurement of the branching ratio of $\bar{B} \to D^{()} τ^{-} {\bar{ν}}_{τ}$ relative to $\bar{B} \to D^{()} ℓ^{-} {\bar{ν}}_{ℓ}$ decays with hadronic tagging at Belle
journal, October 2015

Pati-Salam explanations of the B-meson anomalies
journal, December 2018

Measurement of the Ratio of Branching Fractions $B (B_{c}^{+} \to J / ψ τ^{+} ν_{τ}) / B (B_{c}^{+} \to J / ψ μ^{+} ν_{μ})$
journal, March 2018

Revisiting the one leptoquark solution to the R(D (∗)) anomalies and its phenomenological implications
journal, August 2016

The full $ B\to {D^{*}}{\tau^{-}}{{\overline{v}}_{\tau }} $ angular distribution and CP violating triple products
journal, September 2013

$B$ anomalies and leptoquarks at the LHC: Beyond the lepton-quark final state
journal, December 2018

Combined explanations of B-physics anomalies: the sterile neutrino solution
journal, October 2018

First limit on inclusive decay and constraints on new physics
journal, April 1996

Minimally flavored colored scalar in $ \overline{B}\to {D^{{\left( * \right)}}}\tau \overline{\nu} $ and the mass matrices constraints
journal, November 2013

Diagnosing new physics in $b \to c τ ν_{τ}$ decays in the light of the recent BABAR result
journal, August 2012

LHC constraints and prospects for $S_{1}$ scalar leptoquark explaining the $\bar{B} \to D^{(*)} τ \bar{ν}$ anomaly
journal, August 2016

Evidence for an Excess of $\bar{B} \to D^{(*)} τ^{-} {\bar{ν}}_{τ}$ Decays
journal, September 2012

Exclusive decays $B \to ℓ^{-} \bar{ν}$ and $B \to D^{(*)} ℓ^{-} \bar{ν}$ in the covariant quark model
journal, December 2015

Anatomy of b → c τ ν anomalies
journal, November 2018

Tau longitudinal polarization in $\bar{B} \to D τ \bar{ν}$ and its role in the search for the charged Higgs boson
journal, August 2010

Observation of the Semileptonic Decays $B \to D^{*} τ^{-} {\bar{ν}}_{τ}$ and Evidence for $B \to D τ^{-} {\bar{ν}}_{τ}$
journal, January 2008

$B \to D l ν$ form factors at nonzero recoil and extraction of $| V_{c b} |$
journal, September 2015

$B$ decays with $τ$ leptons in nonuniversal left-right models
journal, January 2013

On the breaking of lepton flavor universality in B decays
journal, July 2015

Analyzing new physics in the decays ${\bar{B}}^{0} \to D^{(*)} τ^{-} {\bar{ν}}_{τ}$ with form factors obtained from the covariant quark model
journal, November 2016

Confronting lepton flavor universality violation in B decays with high- p T tau lepton searches at LHC
journal, January 2017

Search for $B \to h ν \bar{ν}$ decays with semileptonic tagging at Belle
journal, November 2017

$B \to D^{*} τ {\bar{ν}}_{τ}$ sensitivity to new physics
journal, May 2012

Scalar doublet models confront $τ$ and $b$ anomalies
journal, April 2016

New physics in the kinematic distributions of $\bar{B} \to D^{(*)} τ^{-} (\to ℓ^{-} {\bar{ν}}_{ℓ} ν_{τ}) {\bar{ν}}_{τ}$
journal, November 2016

Combined explanations of the $b \to s μ^{+} μ^{-}$ and $b \to c τ^{-} \bar{ν}$ anomalies: A general model analysis
journal, January 2019

Weak form factors for heavy meson decays: An update
journal, May 2000

Measurements of BR(b $\to \tau^- \bar{\nu}_{\tau}$ X) and BR(b $\to \tau^- \bar{\nu}_{\tau}{\mathrm D}^{\ast\pm}$ X) and upper limits on BR(B $^- \to \tau^- \bar{\nu}_{\tau})$ and BR(b $\to{\mathrm s} \nu \bar{\nu})$
journal, February 2001

A closer look at the R D and R D* anomalies
journal, January 2017

First limit on inclusive B → X η, decay and constraints on new physics [Nucl. Phys. B 465 (1996) 369]
journal, December 1996

Closing the window on single leptoquark solutions to the B-physics anomalies
journal, October 2018

Probing a simplified $W^{'}$ model of $R (D^{(*)})$ anomalies using $b$ tags, $τ$ leptons, and missing energy
journal, September 2018

Exclusive semileptonic B-meson decays
journal, December 1989

Observation of $B^{+} \to {\bar{D}}^{* 0} τ^{+} ν_{τ}$ and evidence for $B^{+} \to {\bar{D}}^{0} τ^{+} ν_{τ}$ at Belle
journal, October 2010

It’s all right(-handed neutrinos): a new W ′ model for the R D ∗ $$ {R}_{D^{{}_{\left(\ast \right)}}} $$ anomaly
journal, September 2018

$b \to (c, u) τ ν$ leptonic and semileptonic decays within an effective field theory approach
journal, August 2017

Measurement of an excess of $\bar{B} \to D^{(*)} τ^{-} {\bar{ν}}_{τ}$ decays and implications for charged Higgs bosons
journal, October 2013

Measurement of the $τ$ Lepton Polarization and $R (D^{})$ in the Decay $\bar{B} \to D^{} τ^{-} {\bar{ν}}_{τ}$
journal, May 2017

Measurement of the Ratio of Branching Fractions $B ({\bar{B}}^{0} \to D^{* +} τ^{-} {\bar{ν}}_{τ}) / B ({\bar{B}}^{0} \to D^{* +} μ^{-} {\bar{ν}}_{μ})$
journal, September 2015

Charged Higgs effects on exclusive semi-tauonicB decays
journal, June 1995

Resolution of R/ $R_{D^{⁎}}$ puzzle
journal, September 2018

R D * $$ {R}_{D^{\left(*\right)}} $$ in custodial warped space
journal, December 2018

Review of lattice results concerning low-energy particle physics: Flavour Lattice Averaging Group (FLAG)
journal, February 2017

Measurement of the $τ$ lepton polarization and $R (D^{})$ in the decay $\bar{B} \to D^{} τ^{-} {\bar{ν}}_{τ}$ with one-prong hadronic $τ$ decays at Belle
journal, January 2018

Refining New-Physics Searches in $B \to D τ ν$ with Lattice QCD
journal, August 2012

Scalar contributions to b→c(u)τν transitions
journal, August 2017

$D^{}$ polarization as a probe to discriminate new physics in $\bar{B} \to D^{} τ \bar{ν}$
journal, June 2017

New physics in the weak interaction of $\bar{B} \to D^{(*)} τ \bar{ν}$
journal, February 2013

Effective theory approach to new physics in $b \to u$ and $b \to c$ leptonic and semileptonic decays
journal, December 2013

Testing leptoquark models in $\bar{B} \to D^{(*)} τ \bar{ν}$
journal, November 2013

Publisher’s Note: Measurement of the Ratio of Branching Fractions $B ({\bar{B}}^{0} \to D^{* +} τ^{-} {\bar{ν}}_{τ}) / B ({\bar{B}}^{0} \to D^{* +} μ^{-} {\bar{ν}}_{μ})$ [Phys. Rev. Lett. 115 , 111803 (2015)]
journal, October 2015

R(D(∗)) from W ′ and right-handed neutrinos
journal, September 2018

Probing new physics with $q^{2}$ distributions in $\bar{B} \to D^{(*)} τ \bar{ν}$
journal, June 2015

Probing new physics in ${\bar{B}}^{0} \to D^{(*)} τ^{-} {\bar{ν}}_{τ}$ using the longitudinal, transverse, and normal polarization components of the tau lepton
journal, February 2017

Constraint on the branching ratio of $B_{c}^{-} \to τ \bar{ν}$ from LEP1 data and consequences for $R (D^{(*)})$ anomaly
journal, October 2017

Status of the semileptonic B decays and muon g-2 in general 2HDMs with right-handed neutrinos
journal, May 2018

Tau properties in $B \to D τ ν$ from visible final-state kinematics
journal, May 2017

Publisher’s Note: Search for $B \to h ν \bar{ν}$ decays with semileptonic tagging at Belle [Phys. Rev. D 96 , 091101(R) (2017)]
journal, May 2018

Flavor models for $\bar{B} \to D^{(*)} τ \bar{ν}$
journal, September 2015

Physics of leptoquarks in precision experiments and at particle colliders
journal, June 2016

Extraction of |Vcb| from B → D(∗)ℓνℓ and the Standard Model predictions of R(D(∗))
journal, December 2017

$B \to D ℓ ν$ form factors at nonzero recoil and $| V_{c b} |$ from $2 + 1$ -flavor lattice QCD
journal, August 2015

Averages of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties as of summer 2016
journal, December 2017