Zobrazeno 1 - 10
of 157
pro vyhledávání: '"Kin Wang Ng"'
Publikováno v:
Physics Letters B, Vol 841, Iss , Pp 137939- (2023)
We study the polarizations induced by the Galileon as a stochastic gravitational wave background in the cross correlated power in a pulsar timing array. Working within Galileon gravity, we first show that the scalar gravitational wave signature of th
Externí odkaz:
https://doaj.org/article/6636e014fd244f2aa9382a16afc5fdca
Autor:
Kin-Wang Ng, Yi-Peng Wu
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 11, Pp 1-26 (2021)
Abstract Constant-rate inflation, including ultra-slow-roll inflation as a special case, has been widely applied to the formation of primordial black holes with a significant deviation from the standard slow-roll conditions at both the growing and de
Externí odkaz:
https://doaj.org/article/9a34b2f2ba4642b1a89dd615ea89ceeb
Publikováno v:
Physics Letters B, Vol 827, Iss , Pp 136956- (2022)
We develop a nonperturbative method through the Hartree factorization to examine the quantum fluctuation effects on the single-field inflationary models in a spatially flat FRW cosmological space-time. Apart from the background field equation as well
Externí odkaz:
https://doaj.org/article/6daa8a94d803457da586394736c926d0
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 4, Pp 1-25 (2020)
Abstract It is known that the Higgs potential in the Standard Model can drive a successful inflation as long as the Higgs field couples non-minimally to gravity. It is then inevitable to take into account the loop corrections of the Standard Model pa
Externí odkaz:
https://doaj.org/article/f4adc46b578a4c059f509e8bc6622fea
Publikováno v:
Physics Letters B, Vol 789, Iss , Pp 137-144 (2019)
The recently announced results on the 21-cm absorption spectrum by the EDGES experiment can place very stringent limits on dark matter annihilation cross sections. We properly take into account the heating energy released from dark matter annihilatio
Externí odkaz:
https://doaj.org/article/b07745c7db6949da88ffe9bdadf941d6
Publikováno v:
Physics Letters B, Vol 800, Iss , Pp - (2020)
We study the loop-induced circularly polarized gamma rays from dark matter annihilation using the effective dark matter theory approach. Both neutral scalar and fermionic dark matter annihilating into monochromatic diphoton and Z-photon final states
Externí odkaz:
https://doaj.org/article/6c3d23a8386b445fae6a60f4fc07ad94
Autor:
Huitzu Tu, Kin-Wang Ng
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 7, Pp 1-29 (2017)
Abstract The observed burst duration and energies of the neutrinos from Supernova 1987A strongly limit the possibility of any weakly-interacting light particle species being produced in the proto-neutron star (PNS) core and leading to efficient energ
Externí odkaz:
https://doaj.org/article/ce768f296e1a4d8098494049fcfc2ac1
Autor:
Guo-Chin Liu, Kin-Wang Ng
Publikováno v:
Physical Review D. 107
The detection of gravitational waves from the coalescences of binary compact stars by current interferometry experiments has opened up a new era of gravitational-wave astrophysics and cosmology. The search for a stochastic gravitational-wave backgrou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38bb1c287bba4adaa4ac28b0d6e4d5bb
https://doi.org/10.1103/physrevd.107.104040
https://doi.org/10.1103/physrevd.107.104040
Publikováno v:
Physical Review D. 107
Pulsar timing offers an independent avenue to test general relativity and alternative gravity theories. This requires an understanding of how metric polarizations beyond the familiar transverse tensor ones imprint as a stochastic gravitational wave b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45755aaa57d54056b2e6561546dd0fc8
https://doi.org/10.1103/physrevd.107.044007
https://doi.org/10.1103/physrevd.107.044007
Pulsar timing arrays (PTA) are a promising probe to the cosmologically novel nanohertz gravitational wave (GW) regime through the stochastic GW background. In this work, we consider subluminal GW modes as a possible source of correlations in a PTA, u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::465fc04804cd093774b9f8ac958e9c0b
