Results 21 to 30 of about 3,790,708 (163)

Helicity form factors for

open access: yes, 2020
The helicity form factors of the $$D_{(s)}\rightarrow A \ell ^+ \nu $$ with $$A=a_{1}^{-}, a_{1}^{0}, b_{1}^{-}, b_{1}^{0}, K_{1}(1270)$$ and $$K_{1}(1400)$$ are calculated in the light-cone sum rules approach, up to twist-3 distribution amplitudes of ...
S. Momeni
core   +1 more source

Energy-Momentum Tensor Form Factors in QED

open access: yesSciPost Physics Proceedings, 2022
We present the results for the Energy-Momentum Tensor (EMT) form factor D(t) at oneloop accuracy in quantum electrodynamics for an electron state. We report the the results in the case of both zero and nonzero photon mass.
Simone Rodini, Andreas Metz, Barbara Pasquini
doaj   +1 more source

The influence of urban form on car travel following residential relocation : a current and retrospective study in Scottish urban areas [PDF]

open access: yes, 2014
Spatial planning and spatial policy continues to be used as a tool to bring about changes in travel behaviour. Policy suggests that by creating particular urban forms, demand for travel by car can be reduced.
Lee Woods   +3 more
core   +1 more source

Electromagnetic transition form factors,

open access: yes, 2020
We investigate the electromagnetic transition form factors of the baryon decuplet to the baryon octet, based on the self-consistent SU(3) chiral quark-soliton model, taking into account the effects of explicit breaking of flavor SU(3) symmetry.
June-Young Kim, Hyun-Chul Kim
core   +1 more source

Yang-Mills form factors on self-dual backgrounds

open access: yesJournal of High Energy Physics, 2023
The construction of perturbative quantities on non-linear backgrounds leads to the possibility of incorporating strong field effects in perturbation theory.
Giuseppe Bogna, Lionel Mason
doaj   +1 more source

QCD sum rules study of the semileptonic B-s(B-+/-)(B-0) -> D-s[1968](D-0)(D-+/-)lv decays

open access: yes, 2008
The form factors of the semileptonic Bq -> D-q (J(P) = 0(-))lv with q =s, u,d transitions are calculated in the framework of three point QCD sum rules.
Azizi, K.
core   +1 more source

INTERMOLECULAR POTENTIAL CURVES – «COMPANIONS» AND FORECAST ON THEIR BASIS OF THE CRITICAL PARAMETERS

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2019
An inflection point is entered in the description of the potential curve (PC). Taking into account the emerging possibilities, the potentials of Mi (n – 6) reduced by the properties of nine substances from globular molecules were analyzed.
G.G. Petrik
doaj   +1 more source

Quark and Gluon Form Factors at Three Loops in Perturbative QCD [PDF]

open access: yes, 2009
We compute the quark and gluon form factors at up to three-loop order within massless perturbative Quantum Chromodynamics by studying the photon-quark-anti-quark vertex and the effective vertex of a Higgs boson and two gluons.
IKIZLERLI, NEHIR
core  

Analytic two-loop form factors in N=4 SYM

open access: yes, 2012
The original publication is available at www.springerlink ...
Andreas Brandhuber   +5 more
core   +1 more source

B →ππ form factors from light-cone sum rules with B-meson distribution amplitudes [PDF]

open access: yes, 2017
We study B → ππ form factors using QCD light-cone sum rules with B-meson distribution amplitudes. These form factors describe the semileptonic decay B → π π ℓ ν ¯ ℓ $$ B\to \pi \pi \ell {\overline{\nu}}_{\ell } $$ , and constitute an essential input in B
Khodjamirian, Alexander   +5 more
core   +1 more source

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