Λ c → N form factors from lattice QCD and phenomenology of Λ c → n ℓ + ν ℓ and Λ c → p μ + μ − decays

Meinel, Stefan

doi:10.1103/PhysRevD.97.034511

Title: $Λ_{c} \to N$ form factors from lattice QCD and phenomenology of $Λ_{c} \to n ℓ^{+} ν_{ℓ}$ and $Λ_{c} \to p μ^{+} μ^{-}$ decays

Abstract

We report on a lattice QCD determination of the Λ_c→N vector, axial vector, and tensor form factors. Here, the calculation was performed with 2+1 flavors of domain wall fermions at lattice spacings of a≈0.11 and 0.085 fm and pion masses in the range 230 MeV≲ m_π ≲ 350 MeV. The form factors are extrapolated to the continuum limit and the physical pion mass using modified z expansions. The rates of the charged-current decays Λ_c→ne+ν_e and Λ_c→nμ+ν_μ are predicted to be (0.405 ± 0.016_stat ± 0.020_syst)|V_cd|²ps^₋1 and (0.396 ± 0.016_stat ± 0.020_syst)|V_cd|²ps^₋1, respectively. The phenomenology of the rare charm decay Λ_c→pμ+μ₋ is also studied. The differential branching fraction, the fraction of longitudinally polarized dimuons, and the forward-backward asymmetry are calculated in the Standard Model and in an illustrative new-physics scenario.

Authors:: Meinel, Stefan

Publication Date:: Fri Feb 23 00:00:00 EST 2018

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Org.:: USDOE Office of Science (SC); National Science Foundation (NSF)

OSTI Identifier:: 1422454

Alternate Identifier(s):: OSTI ID: 1544321

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: 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

Citation Formats


                    Meinel, Stefan. Λ c → N form factors from lattice QCD and phenomenology of Λ c → n ℓ + ν ℓ and Λ c → p μ + μ − decays.  United States: N. p., 2018. 
Web.  doi:10.1103/PhysRevD.97.034511.

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                    Meinel, Stefan. Λ c → N form factors from lattice QCD and phenomenology of Λ c → n ℓ + ν ℓ and Λ c → p μ + μ − decays.  United States.  https://doi.org/10.1103/PhysRevD.97.034511

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                    Meinel, Stefan. Fri .  
"Λ c → N form factors from lattice QCD and phenomenology of Λ c → n ℓ + ν ℓ and Λ c → p μ + μ − decays".  United States.  https://doi.org/10.1103/PhysRevD.97.034511.

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@article{osti_1422454,

  title        = {Λ c → N form factors from lattice QCD and phenomenology of Λ c → n ℓ + ν ℓ and Λ c → p μ + μ − decays},

  author       = {Meinel, Stefan},

  abstractNote = {We report on a lattice QCD determination of the Λc→N vector, axial vector, and tensor form factors. Here, the calculation was performed with 2+1 flavors of domain wall fermions at lattice spacings of a≈0.11 and 0.085 fm and pion masses in the range 230 MeV≲ mπ ≲ 350 MeV. The form factors are extrapolated to the continuum limit and the physical pion mass using modified z expansions. The rates of the charged-current decays Λc→ne+νe and Λc→nμ+νμ are predicted to be (0.405 ± 0.016stat ± 0.020syst)|Vcd|2ps₋1 and (0.396 ± 0.016stat ± 0.020syst)|Vcd|2ps₋1, respectively. The phenomenology of the rare charm decay Λc→pμ+μ₋ is also studied. The differential branching fraction, the fraction of longitudinally polarized dimuons, and the forward-backward asymmetry are calculated in the Standard Model and in an illustrative new-physics scenario.},

  doi          = {10.1103/PhysRevD.97.034511},

  journal      = {Physical Review D},

  number       = 3,

  volume       = 97,

  place        = {United States},

  year         = {Fri Feb 23 00:00:00 EST 2018},

  month        = {Fri Feb 23 00:00:00 EST 2018}

}

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TABLE I: Parameters of the lattice gauge field ensembles [21] and light quark propagators. The C14/C24 and F23 data sets are based on the same gauge field ensembles as the C54 and F43 data sets, respectively, and differ only in the valence quark mass used for the propagators. The latticemore »

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Title: Λ c → N form factors from lattice QCD and phenomenology of Λ c → n ℓ + ν ℓ and Λ c → p μ + μ − decays

Abstract

Citation Formats

Figures / Tables:

Continuum limit physics from 2 + 1 flavor domain wall QCD journal, April 2011

Rare baryon decays Λ b → Λ ℓ + ℓ − ( ℓ = e , μ , τ ) and Λ b → Λ γ : Differential and total rates, lepton- and hadron-side forward-backward asymmetries journal, April 2013

Semileptonic decays B → π l ν and D → π l ν from lattice QCD journal, May 2001

Review of Particle Physics journal, October 2016

Axial symmetries in lattice QCD with Kaplan fermions journal, April 1995

Form factors and strong couplings of heavy baryons from QCD light-cone sum rules journal, September 2011

Searches for rare or forbidden semileptonic charm decays journal, October 2011

Erratum: Form factors for Λ b → Λ transitions in the soft-collinear effective theory [Phys. Rev. D 85 , 014035 (2012)] journal, October 2012

Chiral fermions from lattice boundaries journal, September 1993

Bottomonium spectrum at order v 6 from domain-wall lattice QCD: Precise results for hyperfine splittings journal, December 2010

Semileptonic decays of heavy Λ baryons in a quark model journal, September 2005

Semileptonic decays of $$\Lambda _c$$ Λ c baryons in the relativistic quark model journal, November 2016

On D → X u l + l − within the Standard Model and frameworks like the littlest Higgs model with T Parity journal, June 2011

Renormalization group improved action for SU(3) lattice gauge theory and the string tension journal, August 1984

Test flavor SU(3) symmetry in exclusive Λ c decays journal, March 2016

D → ρℓ + ℓ − decays in the QCD factorization approach journal, August 2017

Massive fermions in lattice gauge theory journal, April 1997

Higher-order Wilson coefficients for c → u transitions in the standard model journal, August 2016

A method for simulating chiral fermions on the lattice journal, August 1992

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

Semileptonic Λ b , c to nucleon transitions in full QCD at light cone journal, November 2009

Prospects of discovering new physics in rare charm decays journal, November 2015

Λ c → Λ l + ν l Form Factors and Decay Rates from Lattice QCD with Physical Quark Masses journal, February 2017

Erratum: Heavy-to-light semileptonic decays of Λ b and Λ c baryons in the covariant confined quark model [Phys. Rev. D 90 , 114033 (2014)] journal, September 2016

Charmed bottom baryon spectroscopy from lattice QCD journal, November 2014

Search for c → u l + l − transition in charmed baryon decays journal, February 2016

Matching QCD and heavy-quark effective theory heavy-light currents at two loops and beyond journal, October 1995

Model-independent description of B → π l ν decays and a determination of | V u b | journal, January 2009

Analysis of the semileptonic decay ${{\rm{\Lambda }}}_{c} \rightarrow {{ne}}^{+}{\nu }_{e}$ journal, May 2017

Heavy baryon transitions in a relativistic three-quark model journal, July 1997

Form factors for Λ b → Λ transitions in the soft-collinear effective theory journal, January 2012

Flavor and new physics opportunities with rare charm decays into leptons journal, April 2016

Λ b → Λ ℓ + ℓ − form factors, differential branching fraction, and angular observables from lattice QCD with relativistic b quarks journal, April 2016

Effects of littlest Higgs model in rare D meson decays journal, March 2006

Lattice QCD calculation of B ¯ → Dl ν ¯ decay form factors at zero recoil journal, December 1999

Two loop virtual corrections to $$b\rightarrow (d,s)\ell ^+\ell ^-$$ b → ( d , s ) ℓ + ℓ - and $$c\rightarrow u\ell ^+\ell ^-$$ c → u ℓ + ℓ - for arbitrary momentum transfer journal, November 2017

FCNC transitions of Λ b , c to nucleon in SM journal, October 2010

Domain wall QCD with physical quark masses journal, April 2016

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Heavy-to-light semileptonic decays of Λ b and Λ c baryons in the covariant confined quark model journal, December 2014

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Upper limits for charm hadron decays to two muons plus hadrons journal, February 1995

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Title: $Λ_{c} \to N$ form factors from lattice QCD and phenomenology of $Λ_{c} \to n ℓ^{+} ν_{ℓ}$ and $Λ_{c} \to p μ^{+} μ^{-}$ decays

Continuum limit physics from $2 + 1$ flavor domain wall QCD
journal, April 2011

Rare baryon decays $Λ_{b} \to Λ ℓ^{+} ℓ^{-}$ ( $ℓ = e$ , $μ$ , $τ$ ) and $Λ_{b} \to Λ γ$ : Differential and total rates, lepton- and hadron-side forward-backward asymmetries
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Axial symmetries in lattice QCD with Kaplan fermions
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Form factors and strong couplings of heavy baryons from QCD light-cone sum rules
journal, September 2011

Searches for rare or forbidden semileptonic charm decays
journal, October 2011

Erratum: Form factors for $Λ_{b} \to Λ$ transitions in the soft-collinear effective theory [Phys. Rev. D 85 , 014035 (2012)]
journal, October 2012

Chiral fermions from lattice boundaries
journal, September 1993

Bottomonium spectrum at order $v^{6}$ from domain-wall lattice QCD: Precise results for hyperfine splittings
journal, December 2010

Semileptonic decays of heavy Λ baryons in a quark model
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Semileptonic decays of $$\Lambda _c$$ Λ c baryons in the relativistic quark model
journal, November 2016

On $D \to X_{u} l^{+} l^{-}$ within the Standard Model and frameworks like the littlest Higgs model with $T$ Parity
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Renormalization group improved action for SU(3) lattice gauge theory and the string tension
journal, August 1984

Test flavor SU(3) symmetry in exclusive $Λ_{c}$ decays
journal, March 2016

D → ρℓ + ℓ − decays in the QCD factorization approach
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Massive fermions in lattice gauge theory
journal, April 1997

Higher-order Wilson coefficients for c → u transitions in the standard model
journal, August 2016

A method for simulating chiral fermions on the lattice
journal, August 1992

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

Semileptonic $Λ_{b, c}$ to nucleon transitions in full QCD at light cone
journal, November 2009

Prospects of discovering new physics in rare charm decays
journal, November 2015

$Λ_{c} \to Λ l^{+} ν_{l}$ Form Factors and Decay Rates from Lattice QCD with Physical Quark Masses
journal, February 2017

Erratum: Heavy-to-light semileptonic decays of $Λ_{b}$ and $Λ_{c}$ baryons in the covariant confined quark model [Phys. Rev. D 90 , 114033 (2014)]
journal, September 2016

Charmed bottom baryon spectroscopy from lattice QCD
journal, November 2014

Search for $c \to u l^{+} l^{-}$ transition in charmed baryon decays
journal, February 2016

Matching QCD and heavy-quark effective theory heavy-light currents at two loops and beyond
journal, October 1995

Model-independent description of $B \to π l ν$ decays and a determination of $| V_{u b} |$
journal, January 2009

Analysis of the semileptonic decay ${{\rm{\Lambda }}}_{c} \rightarrow {{ne}}^{+}{\nu }_{e}$
journal, May 2017

Heavy baryon transitions in a relativistic three-quark model
journal, July 1997

Form factors for $Λ_{b} \to Λ$ transitions in the soft-collinear effective theory
journal, January 2012

Flavor and new physics opportunities with rare charm decays into leptons
journal, April 2016

$Λ_{b} \to Λ ℓ^{+} ℓ^{-}$ form factors, differential branching fraction, and angular observables from lattice QCD with relativistic $b$ quarks
journal, April 2016

Effects of littlest Higgs model in rare $D$ meson decays
journal, March 2006

Lattice QCD calculation of $\bar{B} \to Dl \bar{ν}$ decay form factors at zero recoil
journal, December 1999

Two loop virtual corrections to $$b\rightarrow (d,s)\ell ^+\ell ^-$$ b → ( d , s ) ℓ + ℓ - and $$c\rightarrow u\ell ^+\ell ^-$$ c → u ℓ + ℓ - for arbitrary momentum transfer
journal, November 2017

FCNC transitions of Λ _{b , c} to nucleon in SM
journal, October 2010

Domain wall QCD with physical quark masses
journal, April 2016

$B \to K l^{+} l^{-}$ decay form factors from three-flavor lattice QCD
journal, January 2016

Heavy-to-light semileptonic decays of $Λ_{b}$ and $Λ_{c}$ baryons in the covariant confined quark model
journal, December 2014

$Λ_{b} \to p ℓ^{-} {\bar{ν}}_{ℓ}$ and $Λ_{b} \to Λ_{c} ℓ^{-} {\bar{ν}}_{ℓ}$ form factors from lattice QCD with relativistic heavy quarks
journal, August 2015

Upper limits for charm hadron decays to two muons plus hadrons
journal, February 1995

Measurement of the Absolute Branching Fraction for $Λ_{c}^{+} \to Λ e^{+} ν_{e}$
journal, November 2015

Angular analysis of the decay Λ b → Λ(→ Nπ)ℓ + ℓ −
journal, January 2015

The Chroma Software System for Lattice QCD
journal, March 2005

Weak decays of heavy baryons in the light-front approach
journal, August 2018

Sum rules for CP asymmetries of charmed baryon decays in the $$SU(3)_F$$ limit
journal, May 2019

FLAG Review 2019
text, January 2019