Materias dentro de su búsqueda.
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1581por Gozzelino, Andrea“…Seesaw mechanisms involve fermionic weak-isospin singlets (type I) or scalar triplets (type II) or fermion triplets (type III). …”
Publicado 2012
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1582“…Radiative flavor models where the hierarchies of Standard Model (SM) fermion masses and mixings are explained via loop corrections are elegant ways to solve the SM flavor puzzle. …”
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1583por Claringbold, Tangereen“…Six of these models are of scalar dark matter and six are of fermion dark matter. This was done within the framework of contact interactions. …”
Publicado 2015
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1584por Buckholtz, Thomas J“…Results pertain to elementary particles, astrophysics, and cosmology For example, this monograph predicts properties for beyond-the-Standard-Model elementary particles, proposes descriptions of dark matter and dark energy, provides new relationships between known physics constants, includes theory that dovetails with the ratio of dark matter to ordinary matter, includes math that dovetails with the number of elementary-fermion generations, and suggests forces that govern the rate of expansion of the universe…”
Publicado 2016
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1585“…The analysis targets the stop decaying, with 100% branching ratio, into a b quark, a neutralino (the lighest Supersymmetric particle), a fermion and an antifermion, with a final state including two isolated electrons or muons and missing transverse momentum. …”
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1586por CMS Collaboration“…A search for events consistent with the pair production of a heavy mediator particle that decays to a light quark and a new fermion, called a dark quark, is performed using data corresponding to an integrated luminosity of $16.1~\mathrm{fb}^{-1}$ from proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$ collected by the CMS experiment at the LHC in 2016. …”
Publicado 2018
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1587por Freed, Daniel S“…The later lectures turn to more specialized topics in field theory, including the relationship between invertible field theories and stable homotopy theory, extended unitarity, anomalies, and relativistic free fermion systems. The accompanying mathematical explanations touch upon (higher) category theory, duals to the sphere spectrum, equivariant spectra, differential cohomology, and Dirac operators. …”
Publicado 2019
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1588por Kopp, Joachim“…We begin with the dimension-4 "neutrino portal" which leads to mixing between SM neutrino and any new singlet fermion. In this context, we highlight recent insights into the observed neutrino oscillation anomalies, both within the SM and beyond. …”
Publicado 2021
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1589“…We review the implications of these measurements for physics beyond the Standard Model by performing a global model-independent fit to modified $W$ couplings to leptons and four-fermion operators. We also discuss new physics in the context of simplified models and review Standard Model extensions with focus on those which can explain a possible deviation from unitarity of the Cabibbo-Kobayashi-Maskawa quark mixing matrix.…”
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1590por Veronesi, Michele“…This thesis presents the most precise measurement of the oscillation frequency of the $B^0_s$ meson, a neutral state made by the combination of a beauty and a strange quark, using data from the LHCb experiment. Since boson and fermion fields enter virtually in $B^0_s-\overline{B}^0_s$ transitions, the measurement of the $B^0_s$ oscillation frequency does not only offer a laboratory to study the beautiful quantum mechanical properties of the subatomic world, but also provides a gateway to the relativistic quantum fields constituting all elementary particles and fundamental interactions. …”
Publicado 2021
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1591por Gounaris, George J, Kneur, J L, Zeppenfeld, Dieter, Ajaltouni, Ziad J, Arhrib, A, Bella, G, Berends, F A, Bilenky, S M, Blondel, A, Busenitz, J K, Choudhury, D, Clarke, P, Conboy, J E, Diehl, M, Fassouliotis, D, Frère, J M, Georgiopoulos, C H, Gibbs, M, Grünewald, M W, Hansen, J B, Hartmann, C, Jin, B N, Jousset, J, Kalinowski, Jan, Kocian, M L, Lahanas, Athanasios B, Layssac, J, Lieb, E H, Markou, C, Matteuzzi, C, Mättig, P, Moreno, J M, Moultaka, G, Nippe, A, Orloff, J, Papadopoulos, C G, Paschalis, J, Petridou, C, Phillips, H, Podlyski, F, Pohl, M, Renard, F M, Rossignol, J M, Rylko, R, Sekulin, R L, Van Sighem, A, Simopoulou, Errietta, Skillman, A, Spanos, V C, Tonazzo, A, Tytgat, M H G, Tzamarias, S, Verzegnassi, Claudio, Vlachos, N D, Zevgolatakos, E“…The report concentrates on the measurement of WW\gamma and WWZ couplings in e^-e^+\to W^-W^+ or, more generally, four-fermion production at LEP2. In addition the detection of new interactions in the bosonic sector via other production channels is discussed.…”
Publicado 1996
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1592“…We consider the lattice regularization of N=1 supersymmetric Yang--Mills theory with Wilson fermions. This formulation breaks supersymmetry at any finite lattice spacing; we discuss how Ward identities can be used to define a supersymmetric continuum limit, which coincides with the point where the gluino becomes massless. …”
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1593“…As a byproduct of the calculation we also obtain the O(alpha) corrections to the Wilson coefficient of the four-fermion operator Q_2. A careful analysis of the interplay between electroweak and QCD effects leads to an overall 2% reduction of the total branching ratio for B -> X_s gamma due to purely electroweak corrections. …”
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1594por Weber, Martin“…Since the W and Z bosons are unstable and decay into fermions, two- and four-fermion final states, accompanied possibly by photons, play an important role for these measurements. …”
Publicado 2002
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1595por Dührssen, M, Heinemeyer, S, Logan, H, Rainwater, D L, Weiglein, Georg, Zeppenfeld, Dieter“…We show how LHC Higgs boson production and decay data can be used to extract gauge and fermion couplings of Higgs bosons. We show that very mild theoretical assumptions, which are valid in general multi-Higgs doublet models, are sufficient to allow the extraction of absolute values for the couplings rather than just ratios of the couplings. …”
Publicado 2004
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1596“…These processes give rise to four-fermion final states, and are particularly sensitive to possible non-standard trilinear gauge-boson couplings. …”
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1597por Dusinberre Sudano, Elizabeth Jane“…Interpreting the results in the context of production via novel four-fermion contact interactions and the subsequent decay via electroweak processes, upper limits on the production cross section are set. …”
Publicado 2012
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1598por Wolf, Tim Michael Heinz“…The process offers direct sensitivity to the top-Yukawa coupling which is the largest fermion coupling to the Higgs. Any deviation of the top-Yukawa coupling measured directly and compared to indirect constraints would provide a hint towards new physics. …”
Publicado 2018
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1599“…Experimentally observed hierarchy of FQHE in the first and second Landau levels in monolayer graphene and in the zeroth Landau level in bilayer graphene is beyond the conventional composite fermion interpretation but fits to the presented nonlocal topology commensurability condition.…”
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1600“…We considered a one-dimensional topological superconductor, which hosts two Majorana fermion states at its edges. Our results show that the electric and thermal currents across the junction are highly mediated by multiple Andreev reflections between the quantum dot and the leads, thus leading to a strong nonlinear dependence of the current on the applied bias voltage. …”
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