Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Yeuk-Kwan E. Cheung"'
Autor:
Nan Zhang, Yeuk-Kwan E. Cheung
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 2, Pp 1-20 (2020)
Abstract We extend our study on the Coupled-Scalar-Tachyon Bounce Universe to obtain its gravitational waves spectrum. We derive in detail the equations of motion for the tensorial modes of primordial metric perturbations in the Coupled-Scalar-Tachyo
Externí odkaz:
https://doaj.org/article/1452ae8c0fcc4536a53246662d5adce9
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 9, Pp 1-14 (2018)
Abstract A bounce universe model, known as the coupled-scalar-tachyon bounce (CSTB) universe, has been shown to solve the Horizon, Flatness and Homogeneity problems as well as the Big Bang singularity problem. Furthermore a scale invariant spectrum o
Externí odkaz:
https://doaj.org/article/98b26627a9a943feb8aca34d0fd4535c
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 2, Pp 1-9 (2018)
Abstract The on-shell diagram is a very important tool in studying scattering amplitudes. In this paper we discuss the on-shell diagrams without external BCFW bridges. We introduce an extra step of adding an auxiliary external momentum line. Then we
Externí odkaz:
https://doaj.org/article/8e0ec540447a42aebbef0635bb2cabe9
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 12, Pp 1-26 (2017)
Abstract Assuming locality, Lorentz invariance and parity conservation we obtain a set of differential equations governing the 3-point interactions of massless bosons, which in turn determines the polynomial ring of these amplitudes. We derive all po
Externí odkaz:
https://doaj.org/article/2764656de7d9451993567608fbe751f2
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 6, Pp 1-29 (2017)
Abstract In our recent work, we proposed a differential operator for the evaluation of the multi-dimensional residues on isolated (zero-dimensional) poles. In this paper we discuss some new insight on evaluating the (generalized) Cachazo-He-Yuan (CHY
Externí odkaz:
https://doaj.org/article/abe5011bdfe1466aa319405e0083d484
Autor:
J. D. Vergados, Ch. C. Moustakidis, Yeuk-Kwan E. Cheung, H. Ejiri, Yeongduk Kim, Jeong-Yeon Lee
Publikováno v:
Advances in High Energy Physics, Vol 2018 (2018)
In the present work we examine the possibility of detecting electrons in light dark matter searches. These detectors are considered to be the most appropriate for detecting dark matter particles with a mass in the MeV region. We analyze theoretically
Externí odkaz:
https://doaj.org/article/57072da1f438460599ca0aed6e121095
This paper extends the study of the quantum dissipative effects of a cosmological scalar field by taking into account the cosmic expansion and contraction. Cheung, Drewes, Kang and Kim calculated the effective action and quantum dissipative effects o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ac13a19c885e016fc30c355d1a4996d
http://arxiv.org/abs/1904.12941
http://arxiv.org/abs/1904.12941
Publikováno v:
Chinese Physics C. 45:023001
Precise determination of the branching ratio provides an advantageous opportunity for understanding the electroweak structure of the Standard Model, measuring the CKM matrix element , and probing new physics models. In this paper, we discuss the pote
Publikováno v:
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 78, Iss 9, Pp 1-14 (2018)
European Physical Journal C: Particles and Fields, Vol 78, Iss 9, Pp 1-14 (2018)
A bounce universe model, known as the coupled-scalar-tachyon bounce (CSTB) universe, has been shown to solve the Horizon, Flatness and Homogeneity problems as well as the Big Bang singularity problem. Furthermore a scale invariant spectrum of primord
Publikováno v:
Journal of High Energy Physics
We propose a differential operator for computing the residues associated with a class of meromorphic $n$-forms that frequently appear in the Cachazo-He-Yuan form of the scattering amplitudes. This differential operator is conjectured to be uniquely d