Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Machado, Camila S."'
A powerful aspect of effective field theories is connecting scales through renormalisation group (RG) flow. The anomalous dimension matrix of the Standard Model Effective Field Theory (SMEFT) encodes clues to where to find relics of heavy new physics
Externí odkaz:
http://arxiv.org/abs/2210.09316
Autor:
Alioli, Simone, Boughezal, Radja, Cao, Weiguang, Chala, Mikael, Díaz-Carmona, Álvaro, Bakshi, Supratim Das, Durieux, Gauthier, Gráf, Lukáš, Guedes, Guilherme, Henning, Brian Quinn, Kitahara, Teppei, Li, Hao-Lin, Lu, Xiaochuan, Machado, Camila S., Martin, Adam, Melia, Tom, Mereghetti, Emanuele, Murayama, Hitoshi, Murphy, Christopher W., Nepveu, Jasper Roosmale, Pal, Sridip, Petriello, Frank, Shadmi, Yael, Shu, Jing, Weiss, Yaniv, Xiao, Ming-Lei, Yu, Jiang-Hao
In this contribution to the Snowmass 2021 process we review theoretical developments in the Standard Model Effective Field Theory (SMEFT) with a focus on effects at the dimension-8 level and beyond. We review the theoretical advances that led to the
Externí odkaz:
http://arxiv.org/abs/2203.06771
Autor:
Bonnefoy, Quentin, Durieux, Gauthier, Grojean, Christophe, Machado, Camila S., Nepveu, Jasper Roosmale
Publikováno v:
JHEP 05 (2022) 042
We explore the double copy of effective field theories (EFTs), in the recently proposed generalized color-kinematics and Kawai-Lewellen-Tye (KLT) approaches. In the former, we systematically construct scalar numerators satisfying the Jacobi identitie
Externí odkaz:
http://arxiv.org/abs/2112.11453
Publikováno v:
SciPost Phys. 10, 101 (2021)
We apply the on-shell amplitude techniques in the domain of dark matter. Without evoking fields and Lagrangians, an effective theory for a massive spin-$S$ particle is defined in terms of on-shell amplitudes, which are written down using the massive
Externí odkaz:
http://arxiv.org/abs/2011.05339
Publikováno v:
JHEP 12 (2020) 175
The purely on-shell approach to effective field theories requires the construction of independent contact terms. Employing the little-group-covariant massive-spinor formalism, we present the first systematic derivation of independent four-point conta
Externí odkaz:
http://arxiv.org/abs/2008.09652
Publikováno v:
Phys. Rev. Lett. 125, 181602 (2020)
A non-trivial $\mathcal{S}$-matrix generally implies a production of entanglement: starting with an incoming pure state the scattering generally returns an outgoing state with non-vanishing entanglement entropy. It is then interesting to ask if there
Externí odkaz:
http://arxiv.org/abs/2007.09486
Autor:
Falkowski, Adam, Machado, Camila S.
We discuss recursion relations for scattering amplitudes with massive particles of any spin. They are derived via a two-parameter shift of momenta, combining a BCFW-type spinor shift with the soft limit of a massless particle involved in the process.
Externí odkaz:
http://arxiv.org/abs/2005.08981
Autor:
Durieux, Gauthier, Machado, Camila S.
Publikováno v:
Phys. Rev. D 101, 095021 (2020)
We establish a simple formula for the minimal dimension of operators leading to any helicity amplitude. It eases the systematic enumeration of independent operators from the construction of massless non-factorizable on-shell amplitudes. Little-group
Externí odkaz:
http://arxiv.org/abs/1912.08827
Publikováno v:
Phys. Rev. D 102, 075033 (2020)
We have recently shown that axions and axion-like particles (ALPs) may emit an observable stochastic gravitational wave (GW) background when they begin to oscillate in the early universe. In this note, we identify the regions of ALP parameter space w
Externí odkaz:
http://arxiv.org/abs/1912.01007
Publikováno v:
Phys. Rev. D 100, 105019 (2019)
We present a novel framework for obtaining large hierarchies in axion decay constants as well as trans-Planckian field excursions, with no need for tuning or a large number of fields. We consider a model with two or more CFTs with a common cutoff, th
Externí odkaz:
http://arxiv.org/abs/1906.10193