Zobrazeno 1 - 10
of 286
pro vyhledávání: '"Wai Yee Keung"'
Publikováno v:
Nuclear Physics B, Vol 998, Iss , Pp 116393- (2024)
We survey the scalar electroweak multiplets that can originate from a grand unified theory (GUT) like SU(5), SO(10) or E6. We compute the oblique parameters S, T and U for a general scalar electroweak multiplet and then apply the results to the lepto
Externí odkaz:
https://doaj.org/article/472ef4bcb5a443a497a746dc2c77de14
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-25 (2020)
Abstract An old neutron star (NS) may capture halo dark matter (DM) and get heated up by the deposited kinetic energy, thus behaving like a thermal DM detector with sensitivity to a wide range of DM masses and a variety of DM-quark interactions. Near
Externí odkaz:
https://doaj.org/article/c59f9c2a8af245d09f7ce7be5d9e974a
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 5, Pp 1-28 (2020)
Abstract Due to a recent more precise evaluation of V ud and V us , the unitarity condition of the first row in the Cabibbo-Kobayashi-Maskawa (CKM) matrix: |V ud | 2 +|Vus| 2 +|V ub | 2 = 0.99798 ± 0.00038 now stands at a deviation more than 4σ fro
Externí odkaz:
https://doaj.org/article/a7fa1207bd534682b2aa8ca9e29f3d72
Publikováno v:
Letters in High Energy Physics, Vol 2021, Iss 1 (2021)
Data from the Muon \(g − 2\) experiment and measurements of the fine structure constant suggest that the anomalous magnetic moments of the muon and electron are at odds with standard model expectations. We survey the ability of axion-like particles
Externí odkaz:
https://doaj.org/article/1da93dfc639d4347b05e58df62107b3c
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 9, Pp 1-16 (2019)
Abstract We point out that two models that reconcile the neutron lifetime anomaly via dark decays of the neutron, also predict dark matter-neutron ( χ ¯ $$ \overline{\chi} $$ − n) annihilation that may be observable in neutron-antineutron oscilla
Externí odkaz:
https://doaj.org/article/11bb4ceaa4e247f1a389895679220573
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 7, Pp 1-22 (2019)
Abstract We present an analysis of constraints on two types of CP-odd electron-gluonic operators (ēiγ 5 e)G μν a G aμν and e ¯ e G μ ν a G ∼ a μ ν $$ \left(\overline{e}e\right){G}_{\mu \nu}^a{\overset{\sim }{G}}^{a\mu \nu } $$ from curre
Externí odkaz:
https://doaj.org/article/acd6982e1ed14e67be5df11e5d7cb6f2
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 7, Pp 1-15 (2018)
Abstract We show that a novel decay mode Zh of the bound state of stop-anti-stop pair in the ground state 1S0t˜1t˜1* $$ {}^1{S}_0\left({\tilde{t}}_1{\tilde{t}}_1^{*}\right) $$ may have a significant branching ratio if the CP violating mixing appear
Externí odkaz:
https://doaj.org/article/b163535f347f47358ffa2b133cd2ae73
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 6, Pp 1-14 (2017)
Abstract Motivated by a local 3.2 − 3.4 sigma resonance in WH and ZH in the ATLAS Run 2 data, we attempt to interpret the excess in terms of a W′ boson in a SU(2)1 × SU(2)2×U(1)X model. We stretch the deviation from the alignment limit of the E
Externí odkaz:
https://doaj.org/article/2a0ef3ee1e814f25bf7221060bca0d7e
Publikováno v:
Nuclear Physics B, Vol 918, Iss C, Pp 220-244 (2017)
Whilst the prospect of new Z′ gauge bosons with only axial couplings to the Standard Model (SM) fermions is widely discussed, examples of anomaly-free renormalisable models are lacking in the literature. We look to remedy this by constructing sever
Externí odkaz:
https://doaj.org/article/618b0fe8278245db93cd3e756b6a23c0
Publikováno v:
Physics Letters B, Vol 798, Iss , Pp - (2019)
There is a +2σ deviation in the average Higgs-signal strength for all the 7+8+13 TeV data up to Summer 2018. We find that a slight reduction of the bottom-Yukawa coupling can fit the data better than the standard model. We suggest an extension with
Externí odkaz:
https://doaj.org/article/007b859703454a4e806f5d168d5ea1b9