Strangeness and charmness content of the nucleon from overlap fermions on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mo mathvariant="bold">+</mml:mo><mml:mn>1</mml:mn></mml:math>-flavor domain-wall fermion configurations

Gong, Ming; Alexandru, Andrei; Chen, Y.; Doi, Takahiro; Dong, Shao-Jing; Draper, Terrence; Freeman, Walter; Glatzmaier, Michael J.; Li, A.; Liu, K. F.; Liu, Z.

doi:10.1103/physrevd.88.014503

Cited by 94 publications

(77 citation statements)

References 48 publications

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“…Hence at the order one is working here, we unfortunately cannot disentangle a small from a large value of y. Similar picture appears when one takes an overall view on the previous determinations from BChPT [83][84][85] and Lattice QCD [87][88][89][90][91][92][93][94][95][96][97]. Within these two strategies, we predict all the octet baryon sigma terms as well.…”

Section: Jhep05(2016)038 8 Summary and Conclusionmentioning

confidence: 56%

Pion-nucleon scattering in covariant baryon chiral perturbation theory with explicit Delta resonances

Yao

Siemens

Bernard

et al. 2016

J. High Energ. Phys.

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We present the results of a third order calculation of the pion-nucleon scattering amplitude in a chiral effective field theory with pions, nucleons and delta resonances as explicit degrees of freedom. We work in a manifestly Lorentz invariant formulation of baryon chiral perturbation theory using dimensional regularization and the extended on-mass-shell renormalization scheme. In the delta resonance sector, the on mass-shell renormalization is realized as a complex-mass scheme. By fitting the low-energy constants of the effective Lagrangian to the S-and P -partial waves a satisfactory description of the phase shifts from the analysis of the Roy-Steiner equations is obtained. We predict the phase shifts for the D and F waves and compare them with the results of the analysis of the George Washington University group. The threshold parameters are calculated both in the delta-less and delta-full cases. Based on the determined low-energy constants, we discuss the pion-nucleon sigma term. Additionally, in order to determine the strangeness content of the nucleon, we calculate the octet baryon masses in the presence of decuplet resonances up to next-to-next-to-leading order in SU(3) baryon chiral perturbation theory. The octet baryon sigma terms are predicted as a byproduct of this calculation.

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Section: Jhep05(2016)038 8 Summary and Conclusionmentioning

confidence: 56%

Pion-nucleon scattering in covariant baryon chiral perturbation theory with explicit Delta resonances

Yao

Siemens

Bernard

et al. 2016

J. High Energ. Phys.

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“…[9]. The region between orange (black) dashed lines correspond to direct lattice determinations in [12] ( [13]). …”

mentioning

confidence: 99%

“…It is interesting to investigate the impact of nuclear effects on the cancellation between spin-0 and spin-2 amplitude contributions [21]. Hadronic uncertainties are dominated by the strange scalar matrix element [8,9,12,22], and within the bounds from current lattice data [12,13], a precise determination of the charm scalar matrix element can also have significant impact. While in general model-dependent, it is interesting to extend the EFT analysis here to include power corrections in specific ultraviolet completions, and incorporate constraints on heavy WIMPs from other observables such as indirect detection [23].…”

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confidence: 99%

Effective Field Theory for Heavy Weakly Interacting Massive Particles Scattering with Nucleons

2014

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The discovery of a Standard Model-like Higgs boson and the hitherto absence of evidence for other new states may indicate that if WIMPs comprise cosmological dark matter, they are heavy compared to electroweak scale particles, M m W ± , m Z 0 . In this limit, the absolute cross section for a WIMP of given electroweak quantum numbers to scatter from a nucleon becomes computable in terms of Standard Model parameters. We develop effective field theory techniques to analyze the heavy WIMP limit of WIMP-nucleon scattering, and present the first complete calculation of the leading spin-independent cross section in Standard Model extensions consisting of one or two electroweak SU (2)W × U (1)Y multiplets. The impact on scattering cross sections of the choice of WIMP quantum numbers and an extended Higgs sector is investigated.PACS numbers: 95.35.+d, 12.39. Hg, 11.10.Gh, 12.38.Bx, 14.80.Nb, Introduction. Cosmological evidence for dark matter (DM) consistent with Weakly Interacting Massive Particles (WIMPs) motivates laboratory searches for such particles interacting with nuclear targets. Search strategies and detection potential are highly dependent on the WIMP's properties including its spin, its mass, M , and its Standard Model (SM) gauge quantum numbers. In the absence of other signals to guide the search for physics beyond the SM, it is important to identify plausible cross section targets to guide and interpret next generation searches.

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“…The strange quark content was given by the lattice QCD studies [166][167][168][169][170][171][172][173][174][175][176][177][178][179][180][181][182]. The quark masses that we use are [163] m u = 2.2 MeV, (2.24)…”

Section: Jhep12(2014)110mentioning

confidence: 99%

Linear programming analysis of the R-parity violation within EDM-constraints

Yamanaka

Satô

Kubota

2014

J. High Energ. Phys.

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Abstract:The constraint on the R-parity violating supersymmetric interactions is discussed in the light of current experimental data of the electric dipole moment of neutron, 129 Xe , 205 Tl, and 199 Hg atoms, and YbF and ThO molecules. To investigate the constraints without relying upon the assumption of the dominance of a particular combination of couplings over all the rest, an extensive use is made of the linear programming method in the scan of the parameter space. We give maximally possible values for the EDMs of the proton, deuteron, 3 He nucleus, 211 Rn, 225 Ra, 210 Fr, and the R-correlation of the neutron beta decay within the constraints from the current experimental data of the EDMs of neutron, 129 Xe, 205 Tl, and 199 Hg atoms, and YbF and ThO molecules using the linear programming method. It is found that the R-correlation of the neutron beta decay and hadronic EDMs are very useful observables to constrain definite regions of the parameter space of the R-parity violating supersymmetry.

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Strangeness and charmness content of the nucleon from overlap fermions on2+1-flavor domain-wall fermion configurations

Cited by 94 publications

References 48 publications

Pion-nucleon scattering in covariant baryon chiral perturbation theory with explicit Delta resonances

Pion-nucleon scattering in covariant baryon chiral perturbation theory with explicit Delta resonances

Effective Field Theory for Heavy Weakly Interacting Massive Particles Scattering with Nucleons

Linear programming analysis of the R-parity violation within EDM-constraints

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