Zobrazeno 1 - 10
of 199
pro vyhledávání: '"Kampf Karol"'
In this paper, we study the scattering amplitudes and soft theorems for the sigma models with two scalars. We show that if the particles are Goldstone bosons, then you necessarily get Adler zero with no possibility for non-trivial soft theorems. For
Externí odkaz:
http://arxiv.org/abs/2409.09534
Autor:
Bartsch, Christoph, Brown, Taro V., Kampf, Karol, Oktem, Umut, Paranjape, Shruti, Trnka, Jaroslav
Recently, Arkani-Hamed et al. proposed the existence of zeros in scattering amplitudes in certain quantum field theories including the cubic adjoint scalar theory Tr($\phi^3$), the $SU(N)$ non-linear sigma model (NLSM) and Yang-Mills (YM) theory. The
Externí odkaz:
http://arxiv.org/abs/2403.10594
In this letter, we discuss a generalization of the Adler zero to loop integrands in the planar limit of the $SU(N)$ non-linear sigma model (NLSM). While possible to maintain at one-loop, the Adler zero for integrands is violated starting at the two-l
Externí odkaz:
http://arxiv.org/abs/2401.04731
In this letter, we study tree-level scattering amplitudes of scalar particles in the context of effective field theories. We use tools similar to the soft bootstrap to build an ansatz for cyclically ordered amplitudes and impose the Bern-Carrasco-Joh
Externí odkaz:
http://arxiv.org/abs/2305.05688
Publikováno v:
EPJ Web of Conferences, Vol 199, p 05025 (2019)
A framework of operator product expansion (OPE) allows us to study high-energy behaviour of Green functions. A calculation of such Green functions within chiral perturbation theory (χPT) or resonance chiral theory (RχT) and subsequent matching of t
Externí odkaz:
https://doaj.org/article/c6c351e5f2c6478c9b05afecb8ee7c8a
In this paper, we study celestial amplitudes of Goldstone bosons and conformal soft theorems. Motivated by the success of soft bootstrap in momentum space and the important role of the soft limit behavior of tree-level amplitudes, our goal is to exte
Externí odkaz:
http://arxiv.org/abs/2303.14761
In this letter, we construct the recursion relations for one-loop planar integrands in the SU(N) non-linear sigma model. This generalizes the soft recursions for tree-level amplitudes in a variety of quantum field theories with special soft limits. T
Externí odkaz:
http://arxiv.org/abs/2206.04694
The nonlocal order parameters of the QCD chiral symmetry breaking, namely the nonanomalous three-point Green functions of the quark bilinears belonging to the odd intrinsic parity sector, are studied within the framework of the Resonance chiral theor
Externí odkaz:
http://arxiv.org/abs/2206.02579
Autor:
Kampf, Karol
In this work, higher-derivative corrections of the non-linear sigma model of both even and odd intrinsic-parity sectors are systematically studied, focusing on ordered amplitudes of flavor scalars in massless limit. It should correspond to a theory k
Externí odkaz:
http://arxiv.org/abs/2109.11574
We analyze a theory known as extended DBI, which interpolates between DBI and the $U(N)\times U(N)/U(N)$ non-linear sigma model and represents a nontrivial example of theories with mixed power counting. We discuss symmetries of the action and their g
Externí odkaz:
http://arxiv.org/abs/2107.04587