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2901por Mavromatos, Nick E.“…The model can lead to dynamical mass generation for charged fermions. In this article I elaborate further on this idea and I attempt to connect it to specific quantum-gravity models, inspired from string/brane theory. …”
Publicado 2010
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2902“…We find that charged Higgs bosons as light as $75~\mathrm {GeV}$ can still be compatible with the combined data, although this implies severely suppressed charged Higgs couplings to all fermions. In more popular models, e.g. the 2HDM of Type II, we find that flavour physics observables impose a combined lower limit on the charged Higgs mass of $M_{H^\pm } \gtrsim 600$ GeV – independent of $\tan \beta $ – which increases to $M_{H^\pm } \gtrsim 650$ GeV for $\tan \beta < 1$ . …”
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2903“…Similar to the gravitino, the fermionic states may overclose the Universe if they are stable or destroy nucleosynthesis if they decay unless their masses belong to a certain range or inflation dilutes them. …”
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2904por Ariga, Akitaka, Ariga, Tomoko, Boyd, Jamie, Cadoux, Franck, Casper, David W., Favre, Yannick, Feng, Jonathan L., Ferrere, Didier, Galon, Iftah, Gonzalez-Sevilla, Sergio, Hsu, Shih-Chieh, Iacobucci, Giuseppe, Kajomovitz, Enrique, Kling, Felix, Kuehn, Susanne, Levinson, Lorne, Otono, Hidetoshi, Petersen, Brian, Sato, Osamu, Schott, Matthias, Sfyrla, Anna, Smolinsky, Jordan, Soffa, Aaron M., Takubo, Yosuke, Torrence, Eric, Trojanowski, Sebastian, Zhang, Gang“…In particular, we consider all of the renormalizable portal interactions, leading to dark photons, dark Higgs bosons, and heavy neutral leptons; light B-L and Li-Lj gauge bosons; axionlike particles that are coupled dominantly to photons, fermions, and gluons through nonrenormalizable operators; and pseudoscalars with Yukawa-like couplings. …”
Publicado 2018
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2905“…We compare these sensitivities with the corresponding probes of the dimension-8 nTGC operators involving Higgs doublets and the dimension-8 fermionic contact operators that contribute to the e$^{+}$e$^{−}$Zγ vertex.…”
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2906“…It has 18 real parameters and 14 phases, all in all, to address experimental observables of the Standard Model fermions and accomplishes that via simultaneous use of three different mass generation mechanisms. …”
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2907“…Generalized QCD_2 and adjoint-matter coupling , 4.1 Introduction and motivation, 4.2 Scalar and fermionic matter coupling; quantization 4.3 The Hagedorn transition; supersymmetry 4.4 Landau--Ginzburg description; spectrum and string theory 5. …”
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2908“…We specifically consider axion inflation coupled to the Standard Model hypercharge sector, which results in the dual production of hypermagnetic helicity and fermionic charge asymmetries. Although the survival of these charges is endangered by sphaleron processes, magnetic diffusion, and the chiral plasma instability, we find a large range of viable scenarios. …”
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2909“…If the Higgs boson is trapped on a 3+1 dimensional wall with the fermions, large Higgs masses (up to 500 GeV) and relatively light Kaluza-Klein mass scales (less than 4 TeV) can provide a good fit to precision data. …”
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2910“…In CEEX effects due to photon emission from initial beams and outgoing fermions are calculated in QED up to second-order, including all interference effects. …”
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2911“…Intersecting Dp-branes often give rise to chiral fermions living on their intersections. We study the construction of four-dimensional chiral theories by considering configurations of type II D(3+n)-branes wrapped on non-trivial n-cycles on T^{2n} x R^{2(3-n)}/Z_N, for $n=1,2,3$. …”
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2912por Heinemeyer, S., Kanemura, S., Logan, H., Raspereza, A., Tait, Timothy M.P., Baer, H., Berger, Edmond L., Birkedal, A., Brient, J.-C., Carena, Marcela, Cembranos, J.A.R., Choi, S., Godfrey, S., Gunion, J., Haber, H.E., Han, T., Heath, H., Hesselbach, S., Kalinowski, J., Kilian, W., Moortgat-Pick, Gudrid A., Moretti, S., Mrenna, S., Muhlleitner, M., Petriello, F., Reuter, J., Ronan, Michael T., Skands, Peter Z., Sopczak, A., Spira, M., Wagner, C., Weiglein, G., Zerwas, P.“…This comprises the measurement of the Higgs boson mass, its couplings to SM fermions and gauge bosons, and the determination of the spin and the CP quantum numbers of the Higgs. …”
Publicado 2005
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2913“…We present numerical results for the location of the chiral critical line at finite temperature and zero and non-zero baryon density for QCD with N_f=2+1 flavours of staggered fermions on lattices with temporal extent N_t=4. For degenerate quark masses, we compare our results obtained with the exact RHMC algorithm with earlier, inexact R-algorithm results and find a reduction of 25% in the critical quark mass, for which the first order phase transition changes to a smooth crossover. …”
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2914por Butti, Pierfrancesco“…All the known matter is composed of elementary half-spin particles (fermions) whose interactions are mediated by integer spin particles (bosons). …”
Publicado 2017
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2915por Helary, Louis“…In summary, this theory introduces new QCD-like interaction, as well as a new set of fermions, called techniquarks, to generate the mass of the W and Z. …”
Publicado 2010
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2916por Yurkovsky, Evgeny“…We focused on KK excitations of SU(2)×U(1) gauge fields in extra dimensions when the fermions and the SU(3) gauge Bosons are localized in the 3d brane. …”
Publicado 2009
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2917por Heinrich, Markus“…Due to its high mass, the top-quark is important for electroweak symmetry breaking, which generates mass terms for fermions and gauge bosons. Top-quarks at the LHC are mainly produced via t¯t-pairs. …”
Publicado 2009
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2918“…The authors point out that in order to ensure an efficient 'super-GIM' suppression of flavour-changing neutral interactions, the supersymmetric partners of conventional fermions (squarks and sleptons) must be almost degenerate in mass. …”
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2919por CMS Collaboration“…One of the simplest extensions of the standard model is a model with a sequential fourth generation of fermions. Despite the many searches for new quarks, no evidence for their existence has been found. …”
Publicado 2012
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2920por Wendland, D“…A potential extension for the SM would be the adjonction a 4th family of heavy chiral fermions that could provide new sources of CP violation to explain the matter-antimatter asymmetry in the Universe, and allow for a heavier Higgs boson while remaining consistent with other precision electroweak studies. …”
Publicado 2012
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