Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Abhishek Naskar"'
Autor:
Anish Ghoshal, Abhishek Naskar
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 10, Pp 1-13 (2024)
Abstract We investigate the non-perturbatively generated axion-like particle (ALP) potential, involving fermions in the dark sector that couple to the ALP, in an early universe cosmological inflationary stage with the ALP being a spectator field. The
Externí odkaz:
https://doaj.org/article/af7553a96974434ab59e8fd31df38580
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 11, Pp 1-25 (2023)
Abstract We present the possibility that the seesaw mechanism and nonthermal leptogenesis can be investigated via primordial non-Gaussianities in the context of a majoron curvaton model. Originating as a massless Nambu-Goldstone boson from the sponta
Externí odkaz:
https://doaj.org/article/e05031c0aa5145fba20801dc5962b663
Autor:
Abhishek Naskar, Supratik Pal
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 10, Pp 1-13 (2022)
Abstract Recently proposed Swampland Criteria (SC) and Trans-Planckian Censorship Conjecture (TCC) question the theoretical consistency of inflationary cosmology. While SC can be in tension with the recent observational bound on tensor-to-scalar rati
Externí odkaz:
https://doaj.org/article/8eda738d34b247d8b8b32dbd8b47758b
Autor:
Abhishek Naskar, Supratik Pal
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 12, Pp 1-8 (2020)
Abstract We address the possibility of having an enhanced signal for tensor non-Gaussianities in presence of a source, as a signature of Primordial Gravitational Waves. We employ a nearly model-independent framework based on Effective Field Theory of
Externí odkaz:
https://doaj.org/article/6e36edb9a7604d689567dfd412f738fd
Autor:
Shouvik Roy Choudhury, Abhishek Naskar
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 3, Pp 1-17 (2019)
Abstract We obtained constraints on a 12 parameter extended cosmological scenario including non-phantom dynamical dark energy (NPDDE) with CPL parametrization. We also include the six $$\Lambda $$ Λ CDM parameters, number of relativistic neutrino sp
Externí odkaz:
https://doaj.org/article/9b7f3f81ab7f4cc0a3e77ba623576cab
Department of Civil Engineering, Haldia Institute of Technology, Haldia -721657, India E-mail: abhishek.civil.2006@gmail.com, deeptiyellanki@gmail.com, dasdebanjan.324@gmail.com, patrasatyabrata8@gmail.com, sngcehit@gmail.com One of the main building
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::508464e1c0a001c4b9a6675329a498ca
At astrophysical and cosmological scales, there is a detectable amount of magnetic field. There are several probable origins for this observed magnetic field, including the possibility of its origin in the early Universe. There are several models for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0884d4981e6fc44c56171ef85591382c
Autor:
Shouvik Roy Choudhury, Abhishek Naskar
Publikováno v:
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 79, Iss 3, Pp 1-17 (2019)
European Physical Journal C: Particles and Fields, Vol 79, Iss 3, Pp 1-17 (2019)
We obtained constraints on a 12 parameter extended cosmological scenario including non-phantom dynamical dark energy (NPDDE) with CPL parametrization. We also include the six $$\Lambda $$ Λ CDM parameters, number of relativistic neutrino species ($$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::d07de95c9bc87740f1ea488dea8b7bed
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Autor:
Supratik Pal, Abhishek Naskar
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 12, Pp 1-8 (2020)
European Physical Journal
European Physical Journal
We address the possibility of having an enhanced signal for tensor non-Gaussianities in presence of a source, as a signature of Primordial Gravitational Waves. We employ a nearly model-independent framework based on Effective Field Theory of inflatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8720dee0544c5c85b66f4b0c8312802
Autor:
Supratik Pal, Abhishek Naskar
Publikováno v:
Physical Review D. 98
We explore possible non-Gaussian features of primordial gravitational waves by constructing model-independent templates for nonlinearity parameters of tensor bispectrum. Our analysis is based on Effective Field Theory of inflation that relies on no p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57bc00899550a9ed0e231c38367794d7
https://doi.org/10.1103/physrevd.98.083520
https://doi.org/10.1103/physrevd.98.083520