Semileptonic decays of 
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Dai, L. R.; Zhang, Xu; Oset, E.

doi:10.1103/physrevd.98.036004

Cited by 22 publications

(46 citation statements)

References 39 publications

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“…Work along the line of [41] is also done in [42] in the study of the semileptonic B, B * , D, D * decays intoνl and a pseudoscalar or vector meson. Once again, we can relate different reactions up to a global form factor.…”

Section: Introductionmentioning

confidence: 99%

Helicity amplitudes in $$B \rightarrow D^{*} \bar{\nu } l$$ B → D ∗ ν ¯ l decay

Dai¹,

Oset²

2018

Eur. Phys. J. C

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We use a recent formalism of the weak hadronic reactions that maps the transition matrix elements at the quark level into hadronic matrix elements, evaluated with an elaborate angular momentum algebra that allows finally to write the weak matrix elements in terms of easy analytical formulas. In particular they appear explicitly for the different spin third components of the vector mesons involved. We extend the formalism to a general case, with the operator γ μ −αγ μ γ 5 , that can accommodate different models beyond the Standard Model and study in detail the B → D * ν l reaction for the different helicities of the D *. The results are shown for each amplitude in terms of the α parameter that is different for each model. We show that dΓ d M (νl) inv is very different for the different components M = ± 1, 0 and in particular the magnitude dΓ d M (νl) inv | M=−1 − dΓ d M (νl) inv | M=+1 is very sensitive to the α parameter, which suggest to use this magnitude to test different models beyond the standard model. We show that our formalism implies the heavy quark limit and compare our results with calculations that include higher order corrections in heavy quark effective theory. We find very similar results for both approaches in normalized distributions, which are practically identical at the end point of M (νl) inv = m B − m D * .

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Section: Introductionmentioning

confidence: 99%

Helicity amplitudes in $$B \rightarrow D^{*} \bar{\nu } l$$ B → D ∗ ν ¯ l decay

Dai¹,

Oset²

2018

Eur. Phys. J. C

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“…On the other hand, application of another kind of structure, photonic crystal (PhC) slab, in modulating polarization, is capturing interest nowadays [8][9][10][11]. Their simplicity in fabrication, designable band structures, and complex polarization features in the momentum space which are topologically linked with bound states in the continuum [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] are favorable for polarization modulation. However, the reported PhC slabs only support nearly linearly polarized resonances which only cover a small area on the Poincaré sphere.…”

mentioning

confidence: 99%

Circularly Polarized States Spawning from Bound States in the Continuum

et al. 2019

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Bound states in the continuum in periodic photonic systems like photonic crystal slabs are proved to be accompanied by vortex polarization singularities on the photonic bands in the momentum space. The winding structures of polarization states not only widen the field of topological physics but also show great potential that such systems could be applied in polarization manipulating. In this work, we report the phenomenon that by in-plane inversion (C2) symmetry breaking, pairs of circularly polarized states could spawn from the eliminated Bound states in the continuum. Along with the appearance of the circularly polarized states as the two poles of the Poincaré sphere together with linearly polarized states covering the equator, full coverage on the Poincaré sphere could be realized. As an application, ellipticity modulation of linear polarization is demonstrated in the visible frequency range. This phenomenon provides new degree of freedom in modulating polarization.

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“…Since R = 0 cannot be a solution of Eq. (14), unless in the trivial case C 2 = 0 that we have already discussed in the previous section, this pole cannot be removed. Therefore, our solution exhibits a curvature singularity in r = 0 and cannot be interpreted as modelling a stellar configuration.…”

Section: Physical Interpretation Of the New Solutionsmentioning

confidence: 90%

“…The Tolman-Oppenheimer-Volkoff (TOV) approach is a valuable technique to integrate the Einstein field equations of general relativity for a fluid sphere in hydrostatic equilibrium [1][2][3]. Once a polytropic equation of state, relating pressure and energy density of the fluid, is assumed, the same system of differential equations can be applied in the construction of solutions representing gas clouds, stellar configurations, naked singularities, and wormholes [4][5][6][7][8][9][10][11][12][13][14][15]. Also black hole solutions can be understood as limiting-case solutions to the TOV system.…”

Section: Introductionmentioning

confidence: 99%

Black holes and naked singularities from Anton–Schmidt’s fluids

Capozziello

D’Agostino

Gregoris

2020

Physics of the Dark Universe

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Adopting the Tolman-Oppenheimer-Volkoff formalism, we propose a new analytical solution for a static and spherically symmetric black hole where the cosmological constant is generalized to a nonisotropic Anton-Schmidt fluid acting as a unified dark energy -dark matter source. Our novel result can describe a black hole in energetic equilibrium with the surrounding universe. We thus investigate the interplay between the mass of the black hole and the parameters of the Anton-Schmidt equation of state, and physically interpret the solution as a family of space-time metrics that may describe both Schwarzschild-de Sitter black holes and naked singularities. The result opens a new window for further constraining the physical properties of the cosmic fluid using the Event Horizon Telescope results, which complement the analysis relying on classical cosmological observations.

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Semileptonic decays of B() , D() into

Cited by 22 publications

References 39 publications

Helicity amplitudes in $$B \rightarrow D^{*} \bar{\nu } l$$ B → D ∗ ν ¯ l decay

Helicity amplitudes in $$B \rightarrow D^{*} \bar{\nu } l$$ B → D ∗ ν ¯ l decay

Circularly Polarized States Spawning from Bound States in the Continuum

Black holes and naked singularities from Anton–Schmidt’s fluids

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Semileptonic decays of B(*) , D(*) into

Cited by 22 publications

References 39 publications

Helicity amplitudes in $$B \rightarrow D^{*} \bar{\nu } l$$ B → D ∗ ν ¯ l decay

Helicity amplitudes in $$B \rightarrow D^{*} \bar{\nu } l$$ B → D ∗ ν ¯ l decay

Circularly Polarized States Spawning from Bound States in the Continuum

Black holes and naked singularities from Anton–Schmidt’s fluids

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Product

Resources

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Semileptonic decays of B() , D() into