Quark flavor physics and lattice QCD

Wingate, Matthew

doi:10.1140/epja/s10050-021-00547-z

Cited by 9 publications

(11 citation statements)

References 130 publications

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“…[208,209] for recent reviews. Furthermore, one-to-two hadronic transitions induced by a local current can be determined from a corresponding lattice-QCD three-point function involving the current and hadronic states, with successful applications in constraining matrix elements of relevance to flavor physics [163,210,211]. The generalization of this formalism, known as Lellouch-Lüscher method [212], is essential in determining the nn → pp transition amplitude from lattice QCD (see Refs.…”

Section: Extracting Physical Observablesmentioning

confidence: 99%

Neutrinoless Double-Beta Decay: A Roadmap for Matching Theory to Experiment

Cirigliano¹,

Davoudi²,

Dekens³

et al. 2022

Preprint

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The observation of neutrino oscillations and hence non-zero neutrino masses provided a milestone in the search for physics beyond the Standard Model. But even though we now know that neutrinos are massive, the nature of neutrino masses, i.e., whether they are Dirac or Majorana, remains an open question. A smoking-gun signature of Majorana neutrinos is the observation of neutrinoless double-beta decay, a process that violates the lepton-number conservation of the Standard Model. This white paper focuses on the theoretical aspects of the neutrinoless double-beta decay program and lays out a roadmap for future developments. The roadmap is a multi-scale path starting from high-energy models of neutrinoless double-beta decay all the way to the low-energy nuclear many-body problem that needs to be solved to supplement measurements of the decay rate. The path goes through a systematic effective-field-theory description of the underlying processes at various scales and needs to be supplemented by lattice quantum chromodynamics input. The white paper also discusses the interplay between neutrinoless double-beta decay, experiments at the Large Hadron Collider and results from astrophysics and cosmology in probing simplified models of lepton-number violation at the TeV scale, and the generation of the matter-antimatter asymmetry via leptogenesis. This white paper is prepared for the topical groups TF11 (Theory of Neutrino Physics), TF05 (Lattice Gauge Theory), RF04 (Baryon and Lepton Number Violating Processes), NF03 (Beyond the Standard Model) and NF05 (Neutrino Properties) within the Theory Frontier, Rare Processes and Precision Frontier, and Neutrino Physics Frontier of the U.S. Community Study on the Future of Particle Physics (Snowmass 2021).

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Section: Extracting Physical Observablesmentioning

confidence: 99%

Neutrinoless Double-Beta Decay: A Roadmap for Matching Theory to Experiment

Cirigliano¹,

Davoudi²,

Dekens³

et al. 2022

Preprint

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“… The x-dependence of hadronic parton distributions: A review on the progress of lattice QCD (M. Constantinou) [ 3 ]. Quark flavour physics and lattice QCD (M. Wingate) [ 4 ]. Excited states in nucleon structure calculations (K. Ottnad) [ 5 ].…”

Section: Table Of Contentsmentioning

confidence: 99%

Erratum to: Topical issue on Lattice Field Theory during the Covid-19 pandemic

2022

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“…Agreement among determinations signifies the validity of the Standard Model (for these processes, at this level of precision), whereas discrepancies could indicate the presence of new physics. In the case of |V cb | and |V ub |, there are long-standing discrepancies between so-called inclusive determinations, which study decay rates summed over outgoing final states, and the most precise exclusive determinations from semileptonic decays [3,4,5]. This situation is summarized succinctly in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, we end with a few summary remarks in Sec 4. [3] and [5]. The colored bands give the CKM determination based on specific processes.…”

Section: Introductionmentioning

confidence: 99%

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B- and D-meson semileptonic decays with highly improved staggered quarks

Jay¹,

Lytle²,

DeTar³

et al. 2021

Preprint

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We present results for B (s) -and D (s) -meson semileptonic decays from ongoing calculations by the Fermilab Lattice and MILC Collaborations. Our calculation employs the highly improved staggered quark (HISQ) action for both sea and valence quarks and includes several ensembles with physical-mass up, down, strange, and charm quarks and lattice spacings ranging from a ≈ 0.15 fm down to 0.06 fm. At most lattice spacings, an ensemble with physical-mass light quarks is included. The use of the highly improved action, combined with the MILC Collaboration's gauge ensembles with lattice spacings down to a ≈ 0.042 fm, allows heavy valence quarks to be treated with the same discretization as the light and strange quarks. This unified treatment of the valence quarks allows (in some cases) for absolutely normalized currents, bypassing the need for perturbative matching, which has been a leading source of uncertainty in previous calculations of B-meson decay form factors by our collaboration. All preliminary form-factor results are blinded.

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Quark flavor physics and lattice QCD

Cited by 9 publications

References 130 publications

Neutrinoless Double-Beta Decay: A Roadmap for Matching Theory to Experiment

Neutrinoless Double-Beta Decay: A Roadmap for Matching Theory to Experiment

Erratum to: Topical issue on Lattice Field Theory during the Covid-19 pandemic

B- and D-meson semileptonic decays with highly improved staggered quarks

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