Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Teppei Kitahara"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 2, Pp 1-24 (2024)
Abstract In this paper, we scrutinize a radiatively generated QCD θ parameter at the two-loop level based on both full analytical loop functions with the Fock-Schwinger gauge method and the effective field theory approach, using simplified models. W
Externí odkaz:
https://doaj.org/article/4a59ba188e0d4fff870bef699b56199d
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-40 (2023)
Abstract There are two tensions related to the Cabibbo angle of the CKM matrix. First, the determinations of V us from K μ2, K ℓ3, and τ decays disagree at the 3σ level. Second, using the average of these results in combination with β decays (i
Externí odkaz:
https://doaj.org/article/9f77437d67d54da1bc02a57ca210a057
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-32 (2023)
Abstract When the QCD axion is absent in full theory, the strong CP problem has to be explained by an additional mechanism, e.g., the left-right symmetry. Even though tree-level QCD θ ¯ $$ \overline{\theta} $$ parameter is restricted by the mechani
Externí odkaz:
https://doaj.org/article/aa9bcf6ea4834f5fbea8ed92340e7d3f
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-19 (2023)
Abstract We find that the phase appearing in the unitarity relation between B K L → μ + μ − $$ \mathcal{B}\left({K}_L\to {\mu}^{+}{\mu}^{-}\right) $$ and B K L → γγ $$ \mathcal{B}\left({K}_L\to \gamma \gamma \right) $$ is equal to the phase
Externí odkaz:
https://doaj.org/article/8458b532e41c42f48d01c31b92fca6ec
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 11, Pp 1-11 (2022)
Abstract Recently, the CMS collaboration has reported a di-tau excess with a local significance of 2.6–3.1 $$\sigma $$ σ where the invariant mass is $$m_{\tau \tau } =95$$ m τ τ = 95 –100 GeV. This excess can be interpreted as a light scalar b
Externí odkaz:
https://doaj.org/article/69889502cf79405c80603214ab79aae9
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 11, Pp 1-29 (2022)
Abstract We propose a four-dimensional interpretation of the outgoing state of the scattering of a massless fermion off a Dirac monopole. It has been known that such a state has fractional fermion numbers and is necessarily outside the Fock space on
Externí odkaz:
https://doaj.org/article/467ecb9fa2a342f79c41f915c85b055c
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 3, Pp 1-41 (2022)
Abstract We study the on-shell version of the Higgs mechanism in effective theories (EFTs) containing particles of different spins, focusing on contact terms as a simple starting point. We derive the massive contact terms and their coefficients from
Externí odkaz:
https://doaj.org/article/aa1fc5f668c84a4680f4b38ab80fd59d
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-41 (2022)
Abstract Motivated by the b → cτ v ¯ $$ b\to c\tau \overline{v} $$ anomalies, we study non-resonant searches for new physics at the large hadron collider (LHC) by considering final states with an energetic and hadronically decaying τ lepton, a b
Externí odkaz:
https://doaj.org/article/a36a1c94602743bba0d68dc8cabf9f0b
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 7, Pp 1-26 (2021)
Abstract The Fermilab Muon g − 2 collaboration recently announced the first result of measurement of the muon anomalous magnetic moment (g − 2), which confirmed the previous result at the Brookhaven National Laboratory and thus the discrepancy wi
Externí odkaz:
https://doaj.org/article/ad5d2c1fba884bf5882e8a8ae27f9990
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 12, Pp 1-28 (2020)
Abstract 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-po
Externí odkaz:
https://doaj.org/article/b2e5162982e14a8e98f73bf686e8bb47