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相关论文: Gravitational $ D$-Form Factor: The $\sigma$-Meson…

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After improving the knowledge about residua of the semileptonic form factor at its first two poles we show that $f_+^{D\pi}(q^2)$ is not saturated when compared with the experimental data. To fill the difference we approximate the rest of…

高能物理 - 唯象学 · 物理学 2014-10-20 Damir Becirevic , Alain Le Yaouanc , Arantza Oyanguren , Patrick Roudeau , Francesco Sanfilippo

We study exponentiated soft exchange in $d+2$ dimensional gauge and gravitational theories using the celestial CFT formalism. These models exhibit spontaneously broken asymptotic symmetries generated by gauge transformations with…

高能物理 - 理论 · 物理学 2022-01-19 Daniel Kapec , Prahar Mitra

We present the isovector axial, induced pseudoscalar, and pseudoscalar form factors of the nucleon using three twisted-mass fermion ensembles with degenerate up- and down-, strange-, and charm-quarks with masses tuned to their physical…

We analyze Nf=2 nucleon mass data with respect to their dependence on the pion mass down to mpi = 157 MeV and compare it with predictions from covariant baryon chiral perturbation theory (BChPT). A novel feature of our approach is that we…

We present a comprehensive study of the electromagnetic form factor, the decay constant and the mass of the pion computed in lattice QCD with two degenerate O(a)-improved Wilson quarks at three different lattice spacings in the range…

高能物理 - 格点 · 物理学 2015-06-16 Bastian B. Brandt , Andreas Juttner , Hartmut Wittig

We present recent lattice QCD results on the electroweak nucleon to $\Delta$ transition and $\Delta$ form factors using dynamical fermion gauge configurations with a lowest pion mass of about 300 MeV, with special emphasis in the…

高能物理 - 格点 · 物理学 2019-08-15 Constantia Alexandrou

We construct the model incorporating both an arbitrary shift of cosmological constant and Goldstone boson corresponding to the spontaneous breaking down the global shift symmetry in the matter action. The gravity breaks down the symmetry…

广义相对论与量子宇宙学 · 物理学 2015-10-14 Ja. V. Balitsky , V. V. Kiselev

We argue that there is a spontaneously broken rotational symmetry between space-time coordinates and gauge theoretical phases. The dilatonic mode acts as the massive Higgs boson, whose vacuum expectation value determines the gauge…

高能物理 - 唯象学 · 物理学 2014-08-26 Kosuke Odagiri

The $\rho$ meson gravitational form factors are studied based on a light-front constituent quark model which has been successfully employed to calculate its generalized parton distributions and some low-energy observables. The distributions…

高能物理 - 唯象学 · 物理学 2020-05-20 Bao-Dong Sun , Yu-Bing Dong

We report a recent lattice-QCD calculation of nucleon and pion electromagnetic form factors and nucleon axial form factors, with special emphasis on large $Q^2$. Conventional lattice form-factor calculations can only reach about 2.5…

高能物理 - 格点 · 物理学 2015-03-19 Huey-Wen Lin , Saul D. Cohen

We compute the nucleon axial and pseudoscalar form factors using three $N_f=$2+1+1 twisted mass fermion ensembles with all quark masses tuned to approximately their physical values. The values of the lattice spacings of these three physical…

Precision computation of hadronic physics with lattice QCD is becoming feasible. The last decade has seen percent-level calculations of many simple properties of mesons, and the last few years have seen calculations of baryon masses,…

高能物理 - 格点 · 物理学 2012-07-12 Dru B. Renner

We present a short summary for the calculations of the nucleon $\textit{isovector}$ form factors, which are relevant to improving the accuracy of the current neutrino oscillation experiments. The calculations are carried out with two of…

The meson eigenstates of the light-cone Hamiltonian in a coarse transverse lattice gauge theory are investigated. Building upon previous work in pure gauge theory, the Hamiltonian and its Fock space are expanded in powers of dynamical…

高能物理 - 唯象学 · 物理学 2009-11-07 S. Dalley

We present an update on our results of nucleon form factors measured on a large-volume lattice $(8.1\rm{fm})^4$ at almost the physical point in 2+1 flavor QCD. The configurations are generated with the stout-smeared $\mathcal{O}(a)$…

高能物理 - 格点 · 物理学 2018-04-18 Natsuki Tsukamoto , Ken-Ichi Ishikawa , Yoshinobu Kuramashi , Shoichi Sasaki , Takeshi Yamazaki

We evaluate the isovector nucleon electromagnetic form factors in quenched and full QCD on the lattice using Wilson fermions. In the quenched theory we use a lattice of spatial size 3 fm at beta=6.0 enabling us to reach low momentum…

高能物理 - 格点 · 物理学 2008-11-26 C. Alexandrou , G. Koutsou , J. W. Negele , A. Tsapalis

We explore four different strategies to extract the D-meson semileptonic decay form factors from the Green functions computed in QCD numerically on the lattice. From our numerical tests we find that two such strategies, based on the use of…

高能物理 - 格点 · 物理学 2008-11-26 Damir Becirevic , Benjamin Haas , Federico Mescia

We present a lattice determination of the vector and scalar form factors of the $D\to\pi(K)\ell\nu$ semileptonic decays, which are relevant for the extraction of the CKM matrix elements $|V_{cd}|$ and $|V_{cs}|$ from experimental data. Our…

高能物理 - 格点 · 物理学 2018-04-18 Vittorio Lubicz , Lorenzo Riggio , Giorgio Salerno , Silvano Simula , Cecilia Tarantino

We explore the possibility that inflation is driven by supersymmetry breaking with the superpartner of the goldstino (sgoldstino) playing the role of the inflaton. Moreover, we impose an R-symmetry that allows to satisfy easily the…

高能物理 - 理论 · 物理学 2017-11-22 Ignatios Antoniadis , Auttakit Chatrabhuti , Hiroshi Isono , Rob Knoops

I describe recent advances in our understanding of the hadronic form factors governing semileptonic meson transitions. The resulting framework provides a systematic approach to the experimental data, as a means of extracting precision…

高能物理 - 唯象学 · 物理学 2008-11-26 Richard J. Hill
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