Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Strumia, A."'
Autor:
Daniele Barducci, Alessandro Strumia
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 9, Pp 1-14 (2023)
Abstract A muon collider could produce the heavier Standard Model particles with a boost, for example in resonant processes such as μ − μ + → h or μ − μ → Z. We propose machine configurations that produce the boost (asymmetric beam energi
Externí odkaz:
https://doaj.org/article/66a6062d060e4dd2af363075b36fea6e
Autor:
Alessandro Strumia
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 9, Pp 1-24 (2023)
Abstract The Standard Model Higgs potential seems unstable at field values h > h top ~ 1010 GeV. Vacuum decay can be triggered by N ~ 4π/λ ~ 1000 overlapped Higgs bosons with energy λ $$ \sqrt{\lambda } $$ h top. However, this configuration is sti
Externí odkaz:
https://doaj.org/article/9233f8ff7a684e1ab914492a0c76f811
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 7, Pp 1-34 (2023)
Abstract String compactifications on an orbi-folded torus with complex structure give rise to chiral fermions, spontaneously broken CP, modular invariance. We show that this allows simple effective theories of flavour and CP where: i) the QCD angle v
Externí odkaz:
https://doaj.org/article/c3ec82b4256e4a73a182c42a8787660a
Autor:
Alessandro Strumia
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-14 (2023)
Abstract We argue that the rate of Standard Model vacuum or thermal decay seeded by primordial black holes is negligible (because non-perturbatively suppressed by the small quartic Higgs coupling) and independent of the non-minimal coupling of the Hi
Externí odkaz:
https://doaj.org/article/1106a57693144d69801738caa2621267
Autor:
Alessandro Strumia
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-8 (2023)
Abstract We consider generic freeze-in processes for generation of Dark Matter, together with the consequent re-thermalization of the Standard Model fluid. We find that Dark Matter inherits the Standard Model adiabatic inhomogeneities on the cosmolog
Externí odkaz:
https://doaj.org/article/006a190ad41448ca9e0bf3a7f1d9b05d
Autor:
Alessandro Strumia, Nikolaos Tetradis
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 9, Pp 1-22 (2022)
Abstract We consider a scalar potential with two minima, one of which is arbitrarily deep, such as could be the case for the Higgs potential in the Standard Model. A recent calculation within the thin-wall approximation [1] concludes that regions in
Externí odkaz:
https://doaj.org/article/0e1024b505a1441eb3cb306ef083b813
Autor:
Alessandro Strumia
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-19 (2022)
Abstract We perform a global fit of electroweak data, finding that the anomaly in the W mass claimed by the CDF collaboration can be reproduced as a universal new-physics correction to the T parameter or |H † D μ H|2 operator. Contributions at tre
Externí odkaz:
https://doaj.org/article/8c14124bf8b849f1bfc008c3377acf8d
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-25 (2022)
Abstract Capabilities of future colliders are usually discussed assuming specific hypothetical new physics. We consider the opposite possibility: that no new physics is accessible, and we want to learn if the unnatural Standard Model is part of a vas
Externí odkaz:
https://doaj.org/article/385df5efc10343739695d5798e93319f
Autor:
Benedetta Belfatto, Dario Buttazzo, Christian Gross, Paolo Panci, Alessandro Strumia, Natascia Vignaroli, Ludovico Vittorio, Ryoutaro Watanabe
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 6, Pp 1-33 (2022)
Abstract We explore a new mechanism for reproducing the Dark Matter (DM) abundance: scatterings of one DM particle on light Standard Model particles. Strong bounds on its decays can be satisfied if DM undergoes freeze-in and has a mass around or belo
Externí odkaz:
https://doaj.org/article/cd809769d8714e0ca600ecf548c2d3c9
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 5, Pp 1-22 (2022)
Abstract Transforming canonical scalars to the Einstein frame can give a multi-field generalization of pole inflation (namely, a scalar with a divergent kinetic term) at vanishing field-dependent Planck mass. However, to obtain an attractor, the scal
Externí odkaz:
https://doaj.org/article/dd74918a0bde4650988f3e7cde65f46a