4.4 Review

The Standard Model Theory of Neutron Beta Decay

Related references

Note: Only part of the references are listed.
Article Astronomy & Astrophysics

Scrutinizing CKM unitarity with a new measurement of the Kμ3/Kμ2 branching fraction

Vincenzo Cirigliano et al.

Summary: Precision tests of the Cabibbo-Kobayashi-Maskawa matrix indicate tensions in the unitarity relation, both in V-ud and V-us determinations, as well as between K-l2 and K-l3 decays. The authors suggest that a measurement of K-mu 3/K-mu 2 branching fraction at 0.2% precision would provide crucial insights into the experimental situation and constraints on physics beyond the Standard Model. Such a measurement, possible at NA62, would also shed light on the role of right-handed vector currents.

PHYSICS LETTERS B (2023)

Article Astronomy & Astrophysics

Quark mass difference effects in hadronic Fermi matrix elements from first principles

Chien-Yeah Seng et al.

Summary: Recent estimates suggest that the strong isospin-symmetry breaking (ISB) corrections to the Fermi matrix element in free neutron decay may be one order of magnitude larger than the naive estimate based on a theorem. To investigate this claim, we derive a general expression for the leading ISB correction to hadronic Fermi matrix elements, which can be computed from first principles. Our formalism opens up the possibility of determining this correction in the neutron sector with fully-controlled theory uncertainties.

PHYSICS LETTERS B (2023)

Article Physics, Nuclear

Superallowed decays within and beyond the standard model

Adam Falkowski et al.

Summary: This paper reviews the role of superallowed transitions in determining the strength of weak interaction among the lightest quarks and in searching for new physics beyond the standard electroweak model. It also discusses the effects of nucleus-dependent radiative correction and nucleus-independent inner radiative correction. Though there has been significant progress in the study of mirror transitions, the data is still limited by experimental uncertainties.

EUROPEAN PHYSICAL JOURNAL A (2023)

Article Physics, Multidisciplinary

New Insights into the Nucleon's Electromagnetic Structure

Yong-Hui Lin et al.

Summary: The study combined analysis of the electromagnetic form factors of nucleon using dispersion theory, providing consistent description of experimental data. The statistical uncertainties of the extracted form factors are estimated using the bootstrap method, while systematic errors are determined from variations of the spectral functions. The results show good agreement with previous analyses and provide insights into future experimental directions.

PHYSICAL REVIEW LETTERS (2022)

Article Physics, Multidisciplinary

Pion-Induced Radiative Corrections to Neutron β Decay

Vincenzo Cirigliano et al.

Summary: We compute electromagnetic corrections to neutron beta decay using a low-energy hadronic effective field theory and identify new radiative corrections arising from virtual pions that were missed in previous studies. These corrections impact the axial charge of nucleon, beta-u angular correlations, and beta asymmetry.

PHYSICAL REVIEW LETTERS (2022)

Article Physics, Nuclear

Charge-symmetry-breaking effects on neutron ? decay in nonrelativistic quark models

Jacob W. Crawford et al.

Summary: This paper discusses a formalism for the study of charge-symmetry-breaking (CSB) effects and uses it to analyze the effects of charge-symmetry breaking on neutron beta decay. The inclusion of CSB reduces the beta-decay matrix element by a value on the order of 10-4, which is higher than the previous estimate. Previous calculations did not consider the matrix element of the sum of the individual terms between the ground and excited states, instead using the neutron-proton mass difference as the CSB operator. The electromagnetic and dynamic effects of the up-down quark mass difference counteract each other in the computation of the n-p mass difference but contribute coherently to the excitation matrix elements, causing significant enhancements. The current uncertainty in the value of Vud is also of the order of 10-4. To improve that uncertainty by an order of magnitude, future analyses need to include charge-symmetry-breaking effects.

PHYSICAL REVIEW C (2022)

Article Physics, Particles & Fields

On the sensitivity of the D parameter to new physics

Adam Falkowski et al.

Summary: Measurements of angular correlations in nuclear beta decay play a crucial role in testing the Standard Model. In this study, we employ effective field theory techniques to assess the potential of discovering or constraining new physics beyond the SM through these measurements. Our findings show that any deviation larger than 10-5 from the SM prediction is highly inconsistent with existing experimental data, requiring fine tuning of parameters in the UV completion of the EFT to avoid tension.

EUROPEAN PHYSICAL JOURNAL C (2022)

Review Physics, Particles & Fields

FLAG Review 2021

Y. Aoki et al.

Summary: In this review, lattice results related to pion, kaon, D-meson, B-meson, and nucleon physics are discussed, including determination of light-quark masses, form factor in semileptonic K -> pi transition, decay constant ratio, low-energy constants in Chiral Perturbation Theory, B-K parameter, heavy-quark quantities, strong coupling constant, and nucleon matrix elements.

EUROPEAN PHYSICAL JOURNAL C (2022)

Article Physics, Multidisciplinary

Improved Neutron Lifetime Measurement with UCNτ

F. M. Gonzalez et al.

Summary: This study reports an improved measurement of the free neutron lifetime using the UCN τ apparatus, with a value of τ(n) = 877.75 seconds obtained through multiple data acquisition campaigns.

PHYSICAL REVIEW LETTERS (2021)

Review Physics, Nuclear

Precise Measurements of the Decay of Free Neutrons

Dirk Dubbers et al.

Summary: The impact of new and highly precise neutron beta decay data is significant in extracting weak interaction parameters and setting limits on New Physics beyond the Standard Model.

ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE, VOL 71, 2021 (2021)

Article Physics, Particles & Fields

First-generation new physics in simplified models: from low-energy parity violation to the LHC

Andreas Crivellin et al.

Summary: This article investigates the interplay between LHC searches, the Cabibbo angle anomaly, electroweak precision observables, and low-energy parity violation by studying all simplified models that give rise to tree-level effects related to interactions between first-generation quarks and leptons. Matching these models onto Standard Model effective field theory, master formulae are derived in terms of the respective Wilson coefficients, a complete phenomenological analysis of all available constraints is performed, and the potential constraints achievable with forthcoming experiments are projected.

JOURNAL OF HIGH ENERGY PHYSICS (2021)

Article Physics, Particles & Fields

Dispersion relation analysis of the radiative corrections to gA in the neutron β-decay

Mikhail Gorchtein et al.

Summary: In this study, we conducted the first complete dispersion relation analysis of the inner radiative corrections to the axial coupling constant g(A) in neutron beta-decay. By using experimental inputs, we determined the contribution from the gamma W-box diagram with a high precision. Our calculation showed that the inner radiative corrections to the Fermi and the Gamow-Teller matrix element in neutron beta-decay are nearly identical, and the ratio of the axial coupling constant remains almost unrenormalized.

JOURNAL OF HIGH ENERGY PHYSICS (2021)

Article Astronomy & Astrophysics

High-precision determination of the electric and magnetic radius of the proton

Yong-Hui Lin et al.

Summary: Utilizing dispersion theory and an improved description of the two-pion continuum based on precise Roy-Steiner analysis of pion-nucleon scattering, recent data from electron-proton scattering was analyzed. This allowed for a high-precision determination of the electric and magnetic radius of the proton.

PHYSICS LETTERS B (2021)

Article Physics, Particles & Fields

Comprehensive analysis of beta decays within and beyond the Standard Model

Adam Falkowski et al.

Summary: This paper reviews and analyzes precision measurements in allowed nuclear beta decays and neutron decay, confirming the V-A character of the interaction and updating the values for V-ud and g(A) at the 10^(-4) level. By incorporating data from mirror beta transitions in new global fits, the study also places new stringent limits on exotic couplings involving left-handed and right-handed neutrinos.

JOURNAL OF HIGH ENERGY PHYSICS (2021)

Review Physics, Nuclear

Dispersion-theoretical analysis of the electromagnetic form factors of the nucleon: Past, present and future

Yong-Hui Lin et al.

Summary: This review focuses on the dispersion-theoretical analysis of the electromagnetic form factors of the nucleon, highlighting the importance of unitarity and analyticity in constructing isoscalar and isovector spectral functions. New results on nucleon radii, electric and magnetic form factors, and omega-meson couplings are presented, with detailed calculations of theoretical uncertainties using bootstrap and Bayesian methods. Physics of time-like form factors are discussed, with further issues to be addressed in this framework.

EUROPEAN PHYSICAL JOURNAL A (2021)

Article Astronomy & Astrophysics

Radiative Corrections to Semileptonic Beta Decays: Progress and Challenges

Chien-Yeah Seng

Summary: Recent progress has been made in the theory of electroweak radiative corrections in semileptonic decay processes, with the resurrection of Sirlin's representation allowing for a clear separation between calculable and incalculable pieces. This brings substantial improvements to the precision of electroweak radiative corrections in semileptonic decays and is important for precision tests of the Standard Model.

PARTICLES (2021)

Article Astronomy & Astrophysics

Electroweak axial structure functions and improved extraction of the Vud CKM matrix element

K. Shiells et al.

Summary: In this study, a comprehensive analysis of the gamma W interference radiative correction to the neutron beta-decay matrix element is presented using a dispersion relations approach. The real part of the box correction is calculated and a theoretical estimate for the CKM matrix element is provided, which indicates a 4 sigma violation of unitarity.

PHYSICAL REVIEW D (2021)

Article Astronomy & Astrophysics

Lattice QCD calculation of the electroweak box diagrams for the kaon semileptonic decays

Peng-Xiang Ma et al.

Summary: We conducted a lattice QCD calculation to study the axial gamma W-box diagrams relevant for kaon semileptonic decays. By utilizing a recently proposed method, we were able to connect electroweak radiative corrections in Sirlin's representation to that in chiral perturbation theory, allowing us to confirm low energy constants from first principles. Our results also showed a significant reduction in uncertainties compared to previous models.

PHYSICAL REVIEW D (2021)

Article Astronomy & Astrophysics

Standard model O(a) renormalization of gA and its impact on new physics searches

Leendert Hayen

Summary: This paper presents an O(a) Standard Model calculation for inner radiative corrections to Gamow-Teller beta decays, discussing various contributions such as weak magnetism, hadronic contributions, and corrections at low energy. Results for axial and vector inner radiative corrections are provided, allowing for the extraction of g(A)(0) for the first time. Additionally, corrections for a double-counting instance in mirror decay extraction and implications for comparing experimental data to lattice calculations are discussed.

PHYSICAL REVIEW D (2021)

Article Physics, Nuclear

Measurement of the neutron decay electron-antineutrino angular correlation by the aCORN experiment

M. T. Hassan et al.

Summary: The aCORN experiment measures the neutron-decay electron-antineutrino correlation using a novel method based on proton time-of-flight asymmetry. The results from the second run show consistency with the first run, providing measurements for a coefficient and the weak coupling constants ratio lambda. The overall standard uncertainty for a is 1.7%, while lambda is determined to be -1.2796 +/- 0.0062.

PHYSICAL REVIEW C (2021)

Article Physics, Particles & Fields

A new theory framework for the electroweak radiative corrections in Kl3 decays

Chien-Yeah Seng et al.

JOURNAL OF HIGH ENERGY PHYSICS (2020)

Article Physics, Multidisciplinary

First-Principles Calculation of Electroweak Box Diagrams from Lattice QCD

Xu Feng et al.

PHYSICAL REVIEW LETTERS (2020)

Article Physics, Multidisciplinary

Limit on the Fierz Interference Term b from a Measurement of the Beta Asymmetry in Neutron Decay

H. Saul et al.

PHYSICAL REVIEW LETTERS (2020)

Article Physics, Particles & Fields

New method for calculating electromagnetic effects in semileptonic beta-decays of mesons

Chien-Yeah Seng et al.

JOURNAL OF HIGH ENERGY PHYSICS (2020)

Article Astronomy & Astrophysics

Joint lattice QCD-dispersion theory analysis confirms the quark-mixing top-row unitarity deficit

Chien-Yeah Senge et al.

PHYSICAL REVIEW D (2020)

Review Physics, Nuclear

New physics searches in nuclear and neutron β decay

M. Gonzalez-Alonso et al.

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS (2019)

Article Physics, Multidisciplinary

Toward a First-Principles Calculation of Electroweak Box Diagrams

Chien-Yeah Seng et al.

PHYSICAL REVIEW LETTERS (2019)

Article Astronomy & Astrophysics

Radiative corrections to neutron and nuclear beta decays revisited

Andrzej Czarnecki et al.

PHYSICAL REVIEW D (2019)

Article Astronomy & Astrophysics

Nucleon isovector charges and twist-2 matrix elements with Nf=2+1 dynamical Wilson quarks

Tim Harris et al.

PHYSICAL REVIEW D (2019)

Article Physics, Multidisciplinary

Dark Matter Interpretation of the Neutron Decay Anomaly

Bartosz Fornal et al.

PHYSICAL REVIEW LETTERS (2018)

Article Physics, Multidisciplinary

Neutron Lifetime and Axial Coupling Connection

Andrzej Czarnecki et al.

PHYSICAL REVIEW LETTERS (2018)

Article Astronomy & Astrophysics

Proton and neutron electromagnetic form factors and uncertainties

Zhihong Ye et al.

PHYSICS LETTERS B (2018)

Article Physics, Multidisciplinary

High precision analytical description of the allowed β spectrum shape

Leendert Hayen et al.

REVIEWS OF MODERN PHYSICS (2018)

Article Physics, Particles & Fields

Bjorken polarized sum rule and infrared-safe QCD couplings

Cesar Ayala et al.

EUROPEAN PHYSICAL JOURNAL C (2018)

Article Physics, Multidisciplinary

Reduced Hadronic Uncertainty in the Determination of Vud

Chien-Yeah Seng et al.

PHYSICAL REVIEW LETTERS (2018)

Article Astronomy & Astrophysics

Quark contribution to the proton spin from 2+1+1-flavor lattice QCD

Huey-Wen Lin et al.

PHYSICAL REVIEW D (2018)

Article Physics, Nuclear

Neutron lifetime measurements with a large gravitational trap for ultracold neutrons

A. P. Serebrov et al.

PHYSICAL REVIEW C (2018)

Article Astronomy & Astrophysics

Quark spins and anomalous Ward identity

Jian Liang et al.

PHYSICAL REVIEW D (2018)

Article Physics, Nuclear

New result for the neutron β-asymmetry parameter A0 from UCNA

M. A. -P. Brown et al.

PHYSICAL REVIEW C (2018)

Article Astronomy & Astrophysics

Isovector charges of the nucleon from 2+1+1-flavor lattice QCD

Rajan Gupta et al.

PHYSICAL REVIEW D (2018)

Correction Physics, Nuclear

First direct constraints on Fierz interference in free-neutron β decay (vol 96, 042501, 2017)

K. P. Hickerson et al.

PHYSICAL REVIEW C (2017)

Article Astronomy & Astrophysics

Cut moments approach in the analysis of DIS data

D. Kotlorz et al.

PHYSICAL REVIEW D (2017)

Article Physics, Multidisciplinary

Massive Photons: An Infrared Regularization Scheme for Lattice QCD plus QED

Michael G. Endres et al.

PHYSICAL REVIEW LETTERS (2016)

Article Astronomy & Astrophysics

Theoretical constraints and systematic effects in the determination of the proton form factors

I. T. Lorenz et al.

PHYSICAL REVIEW D (2015)

Review Physics, Multidisciplinary

Light-front holographic QCD and emerging confinement

Stanley J. Brodsky et al.

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS (2015)

Article Astronomy & Astrophysics

High precision determination of the Q2 evolution of the Bjorken sum

A. Deur et al.

PHYSICAL REVIEW D (2014)

Article Physics, Multidisciplinary

Isospin Breaking in the Nucleon Mass and the Sensitivity of β Decays to New Physics

M. Gonzalez-Alonso et al.

PHYSICAL REVIEW LETTERS (2014)

Article Physics, Multidisciplinary

Improved Determination of the Neutron Lifetime

A. T. Yue et al.

PHYSICAL REVIEW LETTERS (2013)

Article Physics, Multidisciplinary

Radiative corrections in precision electroweak physics: A historical perspective

Alberto Sirlin et al.

REVIEWS OF MODERN PHYSICS (2013)

Article Physics, Particles & Fields

Non-standard charged current interactions: beta decays versus the LHC

Vincenzo Cirigliano et al.

JOURNAL OF HIGH ENERGY PHYSICS (2013)

Article Physics, Nuclear

The size of the proton: Closing in on the radius puzzle

I. T. Lorenz et al.

EUROPEAN PHYSICAL JOURNAL A (2012)

Article Physics, Particles & Fields

Regge analysis of the ππ scattering amplitude

I. Caprini et al.

EUROPEAN PHYSICAL JOURNAL C (2012)

Article Astronomy & Astrophysics

Probing novel scalar and tensor interactions from (ultra)cold neutrons to the LHC

Tanmoy Bhattacharya et al.

PHYSICAL REVIEW D (2012)

Article Astronomy & Astrophysics

Model-independent determination of the axial mass parameter in quasielastic neutrino-nucleon scattering

Bhubanjyoti Bhattacharya et al.

PHYSICAL REVIEW D (2011)

Article Astronomy & Astrophysics

Fermi matrix element with isospin breaking

P. A. M. Guichon et al.

PHYSICS LETTERS B (2011)

Article Physics, Multidisciplinary

Adler Function, Bjorken Sum Rule, and the Crewther Relation to Order αs4 in a General Gauge Theory

P. A. Baikov et al.

PHYSICAL REVIEW LETTERS (2010)

Article Astronomy & Astrophysics

Neutron lifetime measurement with the UCN trap-in-trap MAMBO II

A. Pichlmaier et al.

PHYSICS LETTERS B (2010)

Proceedings Paper Physics, Particles & Fields

Adler Function, DIS sum rules and Crewther Relations

P. A. Baikov et al.

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS (2010)

Article Astronomy & Astrophysics

Empirical transverse charge densities in the nucleon-to-P11(1440) transition

Lothar Tiator et al.

PHYSICS LETTERS B (2009)

Article Physics, Multidisciplinary

Measurement of the proton asymmetry parameter in neutron beta decay

M. Schumann et al.

PHYSICAL REVIEW LETTERS (2008)

Article Physics, Nuclear

Unitary isobar model-MAID2007

D. Drechsel et al.

EUROPEAN PHYSICAL JOURNAL A (2007)

Article Astronomy & Astrophysics

Resonance production by neutrinos: The second resonance region

Olga Lalakulich et al.

PHYSICAL REVIEW D (2006)

Article Physics, Multidisciplinary

Improved calculation of electroweak radiative corrections and the value of Vud -: art. no. 032002

WJ Marciano et al.

PHYSICAL REVIEW LETTERS (2006)

Article Astronomy & Astrophysics

Light-front hadron dynamics and AdS/CFT correspondence

SJ Brodsky et al.

PHYSICS LETTERS B (2004)

Article Astronomy & Astrophysics

Neutron beta-decay in effective field theory

S Ando et al.

PHYSICS LETTERS B (2004)

Article Astronomy & Astrophysics

Radiative neutron β-decay in effective field theory

W Bernard et al.

PHYSICS LETTERS B (2004)

Article Astronomy & Astrophysics

Precision measurements and CKM unitarity

A Czarnecki et al.

PHYSICAL REVIEW D (2004)

Review Physics, Multidisciplinary

Dispersion relations in real and virtual Compton scattering

D Drechsel et al.

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS (2003)

Article Physics, Nuclear

Experimental value of GA/GV from a measurement of both P-odd correlations in free-neutron decay

YA Mostovoi et al.

PHYSICS OF ATOMIC NUCLEI (2001)