Zobrazeno 1 - 10
of 700
pro vyhledávání: '"R. da Rocha"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 8, Pp 1-23 (2024)
Abstract A connection is established between transonic sound waves propagating along a de Laval nozzle and quasinormal modes emitted from hairy black holes obtained with the gravitational decoupling method applied to the Reissner–Nordström geometr
Externí odkaz:
https://doaj.org/article/f78e1aede1784a679397a147eafa98b5
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 3, Pp 1-8 (2024)
Abstract This work investigates static and dynamical quark star properties within a $$D_3{-}D_7$$ D 3 - D 7 holographic model. We solve the Tolman–Oppenheimer–Volkoff equations for the quark matter equation of state obtained from the brane config
Externí odkaz:
https://doaj.org/article/a7ab1401e7a44acdaa29975e08937430
Autor:
R. Casadio, R. da Rocha
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 6, Pp 1-15 (2023)
Abstract The minimal geometric deformation (MGD) paradigm is here employed to survey axion stars on fluid branes. The finite value of the brane tension provides beyond-general relativity corrections to the density, compactness, radius, and asymptotic
Externí odkaz:
https://doaj.org/article/edae448adc0f49d79808b0446ab2d640
Publikováno v:
Physics Letters B, Vol 849, Iss , Pp 138466- (2024)
We study different entropies for coherent states representing the geometry of spherically symmetric compact systems. We show that the thermodynamic entropy reproduces the Bekenstein-Hawking result in the presence of thermal modes at the Hawking tempe
Externí odkaz:
https://doaj.org/article/dac9dcbc0bd04c579948d23e36a40177
Publikováno v:
Physics Letters B, Vol 846, Iss , Pp 138174- (2023)
Strange axial-vector kaons, K1, and f1 meson resonances are investigated in the 4-flavor AdS/QCD model. Their underlying differential configurational entropy is computed and the mass spectra of higher-excited resonances, in both these mesonic familie
Externí odkaz:
https://doaj.org/article/cf7f424d827745bfb9b5f5f60d86ccc9
Publikováno v:
Nuclear Physics B, Vol 992, Iss , Pp 116227- (2023)
Mass dimension one fermionic fields are prime candidates to describe dark matter, due to their intrinsic neutral nature, as they are constructed as eigenstates of the charge conjugation operator with dual helicity. To formulate the meaning of the dar
Externí odkaz:
https://doaj.org/article/af8bd53a6fa746b3909dc6f9b97ed40f
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 8, Pp 1-7 (2020)
Abstract We investigate the effective Dirac equation, corrected by merging two scenarios that are expected to emerge towards the quantum gravity scale. Namely, the existence of a minimal length, implemented by the generalized uncertainty principle, a
Externí odkaz:
https://doaj.org/article/38527edf8eb44f19acd3c9f3061bdfcc
Autor:
Luiz F. Ferreira, R. da Rocha
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-6 (2020)
Abstract The Kaluza–Klein tower of higher spin-S tensor meson resonances is here scrutinized in the AdS/QCD hard wall model, encompassing the already established resonances $$\rho (770)$$ ρ(770) , $$f_2(1270)$$ f2(1270) , $$\omega _3(1670)$$ ω3(1
Externí odkaz:
https://doaj.org/article/07830f17741d4778ac940fe2fe0e74b5
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 2, Pp 1-6 (2020)
Abstract By exploring a spinor space whose elements carry a spin 1/2 representation of the Lorentz group and satisfy the the Fierz–Pauli–Kofink identities we show that certain symmetries operations form a Lie group. Moreover, we discuss the refle
Externí odkaz:
https://doaj.org/article/0d4f9eecb0784a7885c9b010106f9a6f
Autor:
R. da Rocha, A. A. Tomaz
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 12, Pp 1-23 (2019)
Abstract The holographic entanglement entropy (HEE) of the minimal geometric deformation (MGD) procedure, and its extensions (EMGD), is scrutinized within the membrane paradigm of AdS/CFT. The HEE corrections of the Schwarzschild and Reissner–Nords
Externí odkaz:
https://doaj.org/article/9a48ef40d4e84cb68bf9b9561de477b3