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pro vyhledávání: '"Zlotnikov, Michael"'
Autor:
Zlotnikov, Michael
Publikováno v:
2024 Class. Quantum Grav
We explore the scenario that the observable universe emerged from the vicinity of a negative mass ring singularity, and all content of the universe travels at the same group velocity close to the speed of light on a geodesic trajectory along the axis
Externí odkaz:
http://arxiv.org/abs/2208.03509
Autor:
Law, Y. T. Albert, Zlotnikov, Michael
Publikováno v:
J. High Energ. Phys. (2020) 11: 149
The formalism of relativistic partial wave expansion is developed for four-point celestial amplitudes of massless external particles. In particular, relativistic partial waves are found as eigenfunctions to the product representation of celestial Poi
Externí odkaz:
http://arxiv.org/abs/2008.02331
Autor:
Law, Y. T. Albert, Zlotnikov, Michael
Publikováno v:
J. High Energ. Phys. (2020) 2020: 079
A natural extension of the Pasterski-Shao-Strominger (PSS) prescription is described, enabling the map of Minkowski space amplitudes with massive spinning external legs to the celestial sphere to be performed. An integral representation for the confo
Externí odkaz:
http://arxiv.org/abs/2004.04309
Autor:
Law, Y. T. Albert, Zlotnikov, Michael
Publikováno v:
J. High Energ. Phys. (2020) 2020: 085
The functional structure of celestial amplitudes as constrained by Poincar\'e symmetry is investigated in $2,3,$ and $4$-point cases for massless external particles of various spin, as well as massive external scalars. Functional constraints and recu
Externí odkaz:
http://arxiv.org/abs/1910.04356
Massless scattering amplitudes in four-dimensional Minkowski spacetime can be Mellin transformed to correlation functions on the celestial sphere at null infinity called celestial amplitudes. We study various properties of massless four-point scalar
Externí odkaz:
http://arxiv.org/abs/1904.10940
Pasterski, Shao and Strominger have recently proposed that massless scattering amplitudes can be mapped to correlators on the celestial sphere at infinity via a Mellin transform. We apply this prescription to arbitrary $n$-point tree-level gluon ampl
Externí odkaz:
http://arxiv.org/abs/1711.08435
Autor:
Zlotnikov, Michael
Publikováno v:
J. High Energ. Phys. (2017) 2017: 209
A Cachazo-He-Yuan (CHY) type formula is derived for the leading gluon, bi-adjoint scalar $\phi^3$, Yang-Mills-scalar and non-linear sigma model $m$-soft factors $S_m$ in arbitrary dimension. The general formula is used to evaluate explicit examples f
Externí odkaz:
http://arxiv.org/abs/1708.05016
Akademický článek
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Autor:
Zlotnikov, Michael
We develop a polynomial reduction procedure that transforms any gauge fixed CHY amplitude integrand for $n$ scattering particles into a $\sigma$-moduli multivariate polynomial of what we call the $\textit{standard form}$. We show that a standard form
Externí odkaz:
http://arxiv.org/abs/1605.08758
Publikováno v:
JHEP 07 (2015) 095
We investigate the tree-level S-matrix in gauge theories and open superstring theory with several soft particles. We show that scattering amplitudes with two or three soft gluons of non-identical helicities behave universally in the limit, with multi
Externí odkaz:
http://arxiv.org/abs/1504.05559