☆ 4.7 Article

Determination of light quark masses from η→3π0

PHYSICAL REVIEW D (2008)

Journal

PHYSICAL REVIEW D

Volume 78, Issue 3, Pages -

Publisher

AMER PHYSICAL SOC

DOI: 10.1103/PhysRevD.78.034032

Keywords

-

Categories

Astronomy & Astrophysics Physics, Particles & Fields

Ask authors/readers for more resources

Protocol

Community support

Reagent

Community support

Abstract

We provide a model-independent determination of the quantity B-0(m(d)-m(u)). Our approach rests only on chiral symmetry and data from the decay of the eta into three neutral pions. Since the low-energy prediction at next-to-leading order fails to reproduce the experimental results, we keep the strong interaction correction as an unknown parameter. As a first step, we relate this parameter to the quark mass difference using data from the Dalitz plot. A similar relation is obtained using data from the decay width. Combining both relations we obtain B-0(m(d)-m(u))=(4495 +/- 440) MeV2. The preceding value, combined with lattice determinations, leads to the values m(u)(2 GeV) = (2.9 +/- 0.8) MeV and m(d)(2 GeV) = (4.7 +/- 0.8) MeV.

Authors

I am an author on this paper

Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7

Not enough ratings

Secondary Ratings

Novelty

-

Significance

-

Scientific rigor

-

Rate this paper

Recommended

Article Astronomy & Astrophysics

State mixing and masses of the π0, η and η′ mesons from nf=1+1+1 lattice QCD plus QED

Z. R. Kordov, R. Horsley, W. Kamleh, Z. Koumi, Y. Nakamura, H. Perlt, P. E. L. Rakow, G. Schierholz, H. Stueben, R. D. Young, J. M. Zanotti

Summary: This study analyzed the light pseudoscalar mesons on a lattice, taking into account the mixing between pi degrees, eta, and eta'. The researchers extracted the masses and flavor compositions of the pseudoscalar meson nonet in a lattice QCD + QED setting around an SU(3)-flavor symmetric point, and observed flavor-symmetry features in the data. One key finding was the observed mass splitting between pi degrees and eta, showing a simple relationship with their corresponding flavor compositions.

PHYSICAL REVIEW D (2021)

Add to Collection

Article Physics, Particles & Fields

Masses and decay constants of the η and η′ mesons from lattice QCD

Gunnar S. Bali, Vladimir Braun, Sara Collins, Andreas Schaefer, Jakob Simeth

Summary: In this study, the masses, decay constants, and anomalous matrix elements of the eta and eta ' mesons in N-f = 2 + 1 QCD were determined using non-perturbatively improved Wilson fermions. The data are consistent with Chiral Perturbation Theory (ChPT) and give insights into the quark mass dependence, singlet axial Ward identity, and gluonic matrix elements.

JOURNAL OF HIGH ENERGY PHYSICS (2021)

Add to Collection

Article Astronomy & Astrophysics

Cool quark matter with perturbative quark masses

Tyler Gorda, Saga Saeppi

Summary: In this article, we propose an approximation scheme that simplifies the calculations while maintaining accuracy for perturbative thermal calculations with nonzero quark masses. We apply this scheme to quantum chromodynamics and obtain analytic results that agree well with numerical nonapproximated results.

PHYSICAL REVIEW D (2022)

Add to Collection

Article Nuclear Science & Technology

Gravitational wave echoes from strange quark stars in the equation of state with density-dependent quark masses

Jian-Feng Xu, Lei Cui, Zhen-Yan Lu, Cheng-Jun Xia, Guang-Xiong Peng

Summary: This study investigates the influence of strange quark matter equation of state (EOS) on gravitational wave echoes within the framework of the equivparticle model with density-dependent quark masses and pairing effects. The results show that strange quark stars can generate gravitational wave echoes with frequencies around 20 kHz but cannot account for the observed 72 Hz signal in the GW170817 event. The study also highlights the crucial role of quark-pairing effects in enabling strange quark stars to satisfy the necessary conditions for producing these types of echoes.

NUCLEAR SCIENCE AND TECHNIQUES (2023)

Add to Collection

Article Astronomy & Astrophysics

Simulating rare kaon decays K plus → π plus l plus l- using domain wall lattice QCD with physical light quark masses

P. A. Boyle, F. Erben, J. M. Flynn, V. Gulpers, R. C. Hill, R. Hodgson, A. Juttner, F. O. Hogain, A. Portelli, C. T. Sachrajda

Summary: We perform the first calculation of the electromagnetic form factor V(z) for the long-distance contributions to the K+ -> pi+e+e- decay amplitude using physical light-quark masses. The calculation is done on a 2 + 1 flavor domain wall fermion ensemble with a lattice spacing of a-1 = 1.730(4) GeV. We implement a Glashow-Iliopoulos-Maiani cancellation by extrapolating to the physical charm-quark mass from three masses below charm. We obtain a value of V(z = 0.013(2)) = -0.87(4.44), providing a bound for its magnitude. The large statistical error is due to the stochastically estimated quark loops.

PHYSICAL REVIEW D (2023)

Add to Collection

Article Astronomy & Astrophysics

Determination of |Vcb| using N3LO perturbative corrections to Γ(B → Xclν) and 1S masses

Yuuki Hayashi, Yukinari Sumino, Hiromasa Takaura

Summary: The value of V-cb is determined using perturbative series for the inclusive semileptonic B decay width and the masses of bottomonium 1S states. The study highlights a significant difference in V-cb between two 1S mass schemes, primarily caused by the theoretical inadequacy in describing the observed mass splitting of bottomonium 1S states. The significance of non-perturbative effects in HQET with respect to the current perturbative accuracy is also examined.

PHYSICS LETTERS B (2022)

Add to Collection

Article Astronomy & Astrophysics

Light double-gluon hybrid states from QCD sum rules

Niu Su, Hua-Xing Chen, Wei Chen, Shi-Lin Zhu

Summary: We investigate the double-gluon hybrid states composed of quark-gluon contents q over bar qgg (q = u/d) and s over bar sgg. Twelve double-gluon hybrid currents with various quantum numbers are constructed, and five of them are found to be zero due to some internal symmetries. The remaining seven currents are used for QCD sum rule analyses. In particular, the masses of the double-gluon hybrid states with exotic quantum number JPC = 2+- are calculated to be Mlq over bar qgg;2+-) = 2.26+0.20 -0.25 GeV and Mls over bar sgg;2+-) = 2.38+0.19 -0.25 GeV. Their two-and three-meson decay patterns are also studied.

PHYSICAL REVIEW D (2023)

Add to Collection

Article Physics, Particles & Fields

Charm sea effects on charmonium decay constants and heavy meson masses: ALPHA Collaboration

Salvatore Cali, Kevin Eckert, Jochen Heitger, Francesco Knechtli, Tomasz Korzec

Summary: The study focuses on the effects of the charm quark in the sea on the decay constants of charmonium and heavy meson masses. Results show that sea charm quark effects on the decay constants of charmonium are below 1% and the decoupling of charm quarks works well up to energies of about 500 MeV.

EUROPEAN PHYSICAL JOURNAL C (2021)

Add to Collection

Article Physics, Particles & Fields

Light neutrino masses from gravitational condensation: the Schwinger-Dyson approach

Gabriela Barenboim, Jessica Turner, Ye-Ling Zhou

Summary: The study demonstrates that non-zero neutrino masses can be generated from gravitational interactions. By solving the Schwinger-Dyson equations, the scale of neutrino condensate and the number of new particle degrees of freedom required for gravitationally induced dynamical chiral symmetry breaking are determined. It is shown that for minimal beyond the Standard Model particle content, the condensation scale occurs close to the Planck scale.

EUROPEAN PHYSICAL JOURNAL C (2021)

Add to Collection

Article Physics, Particles & Fields

Masses and strong decays of open charm hexaquark states Σc() Σc()

Xi-Zhe Ling, Ming-Zhu Liu, Li-Sheng Geng

Summary: Inspired by the recent discovery of the doubly charmed tetraquark state T-cc(+) by the LHCb Collaboration, a study on the masses and strong decays of open charm hexaquark states Sigma((*))(c) Sigma((*))(c) was conducted. Bound states of various isospin values were predicted, and decay widths of Sigma((*))(c) Sigma((*))(c) -> Lambda(c)Lambda(c) were estimated via effective Lagrangian approach, with recommendations for future experimental searches for these hexaquark states in the Lambda(c)Lambda(c) invariant mass distributions.

EUROPEAN PHYSICAL JOURNAL C (2021)

Add to Collection

Article Astronomy & Astrophysics

Electron scattering of light new particles from evaporating primordial black holes

Roberta Calabrese, Marco Chianese, Damiano F. G. Fiorillo, Ninetta Saviano

Summary: The study examines the investigation of dark matter through the Hawking radiation from primordial black holes, suggesting the existence of new particles beyond the Standard Model. The interaction between primordial black holes and lighter particles can be constrained through various experiments.

PHYSICAL REVIEW D (2022)

Add to Collection

Article Astronomy & Astrophysics

Study of I=0 bottomonium bound states and resonances in S, P, D, and F waves with lattice QCD static-static-light-light potentials

Pedro Bicudo, Nuno Cardoso, Lasse Mueller, Marc Wagner

Summary: In this paper, the study of I=0 bottomonium in various waves and channels is presented, using a novel approach involving lattice QCD string breaking potentials. The results are compared to experimental data and the angular momentum quantum numbers are assigned. The composition of these states is also determined to distinguish between ordinary quarkonium and tetraquarks.

PHYSICAL REVIEW D (2023)

Add to Collection

Article Astronomy & Astrophysics

Signature of a light charged Higgs boson from top quark pairs at the LHC

YaLu Hu, ChunHao Fu, Jun Gao

Summary: The study focuses on the signature of a light charged Higgs boson produced at the Large Hadron Collider, and reinterprets the experimental data to obtain improved agreements. It also provides the first limit on the total branching ratio of the three-body decay and the strongest direct constraints on the parameter space of a certain type of two-Higgs-doublet models.

PHYSICAL REVIEW D (2022)

Add to Collection

Article Astronomy & Astrophysics

Flavor non-universal Pati-Salam unification and neutrino masses

Javier Fuentes-Martin, Gino Isidori, Julie Pages, Ben A. Stefanek

Summary: In this study, the neutrino mass spectrum is analyzed and an extra-dimensional interpretation of a three-site Pati-Salam model is discussed. The model unifies all families of quark and leptons, provides a natural description of the Standard Model Yukawa couplings, and could potentially explain recent B-physics anomalies. The key feature of the model is the breaking of the Pati-Salam and electroweak gauge symmetries localized on opposite sites, with communication via nearest-neighbor interactions.

PHYSICS LETTERS B (2021)

Add to Collection

Article Physics, Particles & Fields

Towards an improved understanding of η → γγ

S. Holz, J. Plenter, C. W. Xiao, T. Dato, C. Hanhart, B. Kubis, U-G Meissner, A. Wirzba

Summary: The study suggests that high-quality data on the e(+)e(-) -> pi(+) pi(-) eta reaction can determine the doubly-virtual form factor eta -> gamma*gamma* in a model-independent manner with controlled accuracy. This is crucial for evaluating the hadronic light-by-light scattering contribution to the muon's anomalous magnetic moment. Analyzing existing data for e(+) e(-) -> pi(+) pi(-) eta with total energies squared k(2) > 1GeV(2) shows that the a(2) meson effect disrupts the commonly used factorization ansatz in the doubly-virtual form factor, highlighting the need for better data.

EUROPEAN PHYSICAL JOURNAL C (2021)

Add to Collection

Article Physics, Particles & Fields

Natural supersymmetry and unification in five dimensions

Ammar Abdalgabar, Alan S. Cornell, Aldo Deandrea, Moritz McGarrie

JOURNAL OF HIGH ENERGY PHYSICS (2016)

Add to Collection

Article Physics, Particles & Fields

Towards Kaluza-Klein Dark Matter on nilmanifolds

David Andriot, Giacomo Cacciapaglia, Aldo Deandrea, Nicolas Deutschmann, Dimitrios Tsimpis

JOURNAL OF HIGH ENERGY PHYSICS (2016)

Add to Collection

Article Physics, Particles & Fields

Search for a lighter Higgs boson in Two Higgs Doublet Models

Giacomo Cacciapaglia, Aldo Deandrea, Suzanne Gascon-Shotkin, Solene Le Corre, Morgan Lethuillier, Junquan Tao

JOURNAL OF HIGH ENERGY PHYSICS (2016)

Add to Collection

Article Physics, Particles & Fields

Dark matter and localised fermions from spherical orbifolds?

Giacomo Cacciapagli, Aldo Deandrea, Nicolas Deutschmann

JOURNAL OF HIGH ENERGY PHYSICS (2016)

Add to Collection

Article Physics, Particles & Fields

Probing vector-like quark models with Higgs-boson pair production

Giacomo Cacciapaglia, Haiying Cai, Alexandra Carvalho, Aldo Deandrea, Thomas Flacke, Benjamin Fuks, Devdatta Majumder, Hua-Sheng Shao

JOURNAL OF HIGH ENERGY PHYSICS (2017)

Add to Collection

Article Astronomy & Astrophysics

Unification of gauge and Yukawa couplings

Ammar Abdalgabar, Mohammed Omer Khojali, Alan S. Cornell, Giacomo Cacciapaglia, Aldo Deandrea

PHYSICS LETTERS B (2018)

Add to Collection

Article Physics, Particles & Fields

LHC constraints and potential on resonant monotop production

Giacomo Cacciapaglia, Eric Conte, Aldo Deandrea, Benjamin Fuks, Hua-Sheng Shao

EUROPEAN PHYSICAL JOURNAL C (2019)

Add to Collection

Article Astronomy & Astrophysics

Next-to-leading-order predictions for single vector-like quark production at the LHC

Giacomo Cacciapaglia, Alexandra Carvalho, Aldo Deandrea, Thomas Flacke, Benjamin Fuks, Devdatta Majumder, Luca Panizzi, Hua-Sheng Shao

PHYSICS LETTERS B (2019)

Add to Collection

Article Physics, Particles & Fields

Black holes and nilmanifolds: quasinormal modes as the fingerprints of extra dimensions?

Anna Chrysostomou, Alan Cornell, Aldo Deandrea, Etienne Ligout, Dimitrios Tsimpis

Summary: We investigate the possibility of using quasinormal modes (QNMs) in detecting extra dimensions. Specifically, we focus on higher dimensions characterized by negative Ricci curvature, which is not well explored in the Beyond the Standard Model (BSM) literature. By modeling the perturbations of a four-dimensional Schwarzschild black hole space-time with a three-dimensional nilmanifold, we suggest that the extra-dimensional geometry can be represented by a squared mass-like term in the QNM effective potential, representing the Kaluza-Klein (KK) spectrum. We then compute the QNM spectrum using three different numerical methods and determine a detectability bound for KK masses using QNMs.

EUROPEAN PHYSICAL JOURNAL C (2023)

Add to Collection

Article Astronomy & Astrophysics

Future lepton collider prospects for a ubiquitous composite pseudoscalar

Alan S. Cornell, Aldo Deandrea, Benjamin Fuks, Lara Mason

PHYSICAL REVIEW D (2020)

Add to Collection

Proceedings Paper Physics, Applied

Evolution of the gauge couplings and Weinberg angle in 5-dimensions for an SU(5) and fipped SU(5) gauge group

Mohammed Omer Khojali, A. S. Cornell, Aldo Deandrea, Giacomo Cacciapaglia

INTERNATIONAL WORKSHOP ON DISCOVERY PHYSICS AT THE LHC (2017)

Add to Collection

Proceedings Paper Physics, Applied

Bounds for lighter Higgses in extensions of the Standard Model

Aldo Deandrea

INTERNATIONAL WORKSHOP ON DISCOVERY PHYSICS AT THE LHC (2017)

Add to Collection

Proceedings Paper Physics, Multidisciplinary

Evolution of the gauge couplings and Weinberg angle in 5-dimensions for a G2 gauge group

Mohammed Omer Khojali, A. S. Cornell, Aldo Deandrea, Giacomo Cacciapaglia

HIGH ENERGY PARTICLE PHYSICS WORKSHOP 2017 (2017)

Add to Collection

Proceedings Paper Physics, Particles & Fields

The evolution of gauge couplings and the Weinberg angle in 5 dimensions for an SU(3) gauge group

Mohammed Omer Khojali, A. S. Cornell, Aldo Deandrea

HIGH ENERGY PARTICLE PHYSICS WORKSHOP 2016 (2017)

Add to Collection

Article Astronomy & Astrophysics

Fundamental composite electroweak dynamics: Status at the LHC

Alexandre Arbey, Giacomo Cacciapaglia, Haiying Cai, Aldo Deandrea, Solene Le Corre, Francesco Sannino

PHYSICAL REVIEW D (2017)

Add to Collection

No Data Available

© Peeref 2019-2024. All rights reserved.