scholarly journals ACCOUNTING FOR THE FINITENESS OF THE HIGGS–BOSON MASS IN THE 3D GEORGI–GLASHOW MODEL

2002 ◽  
Vol 17 (05) ◽  
pp. 279-288 ◽  
Author(s):  
DMITRI ANTONOV
Keyword(s):  
Higgs Boson ◽  
Weak Coupling ◽  
W Boson ◽  
Higgs Field ◽  
String Tension ◽  
Boson Mass ◽  
Cumulant Expansion ◽  
Debye Mass ◽  
Weak Coupling Approximation ◽  
Order Of Magnitude

(2 + 1)-dimensional Georgi–Glashow model is explored in the regime when the Higgs boson is not infinitely heavy, but its mass is of the same order of magnitude as the mass of the W-boson. In the weak-coupling limit, the Debye mass of the dual photon and the expression for the monopole potential are found. The cumulant expansion applied to the average over the Higgs field is checked to be convergent for the known data on the monopole fugacity. These results are further generalized to the SU (N)-case. In particular, it is found that the requirement of convergence of the cumulant expansion establishes a certain upper bound on the number of colors. This bound, expressed in terms of the parameter of the weak-coupling approximation, allows the number of colors to be large enough. Finally, the string tension and the coupling constant of the so-called rigidity term of the confining string are found at arbitrary number of colors.

scholarly journals HIGGS-INSPIRED CORRECTIONS TO THE RG FLOW IN THE FINITE-TEMPERATURE 3D GEORGI–GLASHOW MODEL AND ITS SU(N)-GENERALIZATION

2002 ◽  
Vol 17 (14) ◽  
pp. 851-863 ◽  
Author(s):  
DMITRI ANTONOV
Keyword(s):  
Higgs Boson ◽  
Finite Temperature ◽  
Higgs Mass ◽  
W Boson ◽  
Higgs Field ◽  
Free Energy Density ◽  
Boson Mass ◽  
Leading Order ◽  
Order Of Magnitude ◽  
Bkt Phase Transition

The RG flow in the finite-temperature (2 + 1)D Georgi–Glashow model is explored in the regime when the Higgs field is not infinitely heavy, but its mass is rather of the same order of magnitude as the mass of the W-boson. The corrections to the standard RG flow are derived to the leading order in the inverse mass of the Higgs boson. The scaling of the free-energy density in the critical region and the value of the critical temperature of the Berezinsky–Kosterlitz–Thouless (BKT) phase transition are found to be unaffected by the finiteness of the Higgs–boson mass. The evolution of the Higgs mass itself is also investigated and shown to be rather weak, that enables one to treat this parameter as a constant. The same analysis is further performed in the SU (N)-case at N > 2, where the RG invariance is demonstrated to hold only approximately, in a certain sense. Modulo this approximation, the critical behavior of the SU (N)-model turns out to be identical to that of the SU(2)-one.

scholarly journals Restrictions on the mass of the KK excitation W′ from the Higgs boson diphoton decay and the single top production.

2018 ◽  
Vol 191 ◽  
pp. 02007 ◽  
Author(s):  
Alexey Baskakov ◽  
Eduard Boos ◽  
Viacheslav Bunichev ◽  
Maxim Perfilov ◽  
Igor Volobuev
Keyword(s):  
Higgs Boson ◽  
Production Process ◽  
W Boson ◽  
High Energy ◽  
Brane World ◽  
Boson Mass ◽  
High Luminosity ◽  
Single Top

In the framework of stabilized brane-world models we consider the contribution of the W′ boson and the rest of the W boson KK tower to the Higgs boson decay to two photons and to the single top production process. Comparing the signal strengths calculated in this approach with the experimental ones obtained at the LHC and taking into account the expected improvements at future high luminosity HL-LHC, high energy HE-LHC, and FCC-hh projects, we get predictions for the limits on the W' boson mass depending on its coupling to SM fermions.

scholarly journals Indirect reach of heavy MSSM Higgs bosons by precision measurements at future lepton colliders

2015 ◽  
Vol 30 (33) ◽  
pp. 1550192 ◽  
Author(s):  
Mitsuru Kakizaki ◽  
Shinya Kanemura ◽  
Mariko Kikuchi ◽  
Toshinori Matsui ◽  
Hiroshi Yokoya
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
W Boson ◽  
Linear Collider ◽  
Standard Model Prediction ◽  
Branching Fraction ◽  
International Linear Collider ◽  
Higgs Bosons ◽  
Boson Mass ◽  
Electron Positron

In the Minimal Supersymmetric Standard Model (MSSM), the bottom Yukawa coupling of the Higgs boson can considerably deviate from its Standard Model prediction due to nondecoupling effects. We point out that the ratio of the Higgs boson decay branching fraction to a bottom quark pair and that to a W-boson pair from the same production channel is particularly sensitive to large additional MSSM Higgs boson mass regions at future electron–positron colliders. Based on this precision measurement, we explicitly show the indirect discovery reach of the additional Higgs bosons according to planned programs of the International Linear Collider.

scholarly journals A Proposed SUSY Alternative (SUSYA) Based on a New Type of Seesaw Mechanism Applicable to All Elementary Particles and Predicting a New Type of Aether Theory

2020 ◽  
pp. 19-52
Author(s):  
Andrei-Lucian Drăgoi
Keyword(s):  
Higgs Boson ◽  
W Boson ◽  
Higgs Field ◽  
Energy Scale ◽  
Elementary Particles ◽  
Fermion Mass ◽  
Physical Vacuum ◽  
Zero Energy ◽  
Seesaw Mechanism ◽  
New Type

This paper proposes a potentially viable “out-of-the-box” alternative (called “SUSYA”) to the currently known supersymmetry (SUSY) theory variants: SUSYA essentially proposes a new type of seesaw mechanism (SMEC) applicable to all elementary particles (EPs) and named “Z-SMEC”; Z-SMEC is a new type of charge-based mass symmetry/”conjugation” between EPs which predicts the zero/non-zero rest masses of all known/unknown EPs, EPs that are “conjugated” in boson-fermion pairs sharing the same electromagnetic charge (EMC). Z-SMEC is actually derived from an extended zero-energy hypothesis (eZEH) which is essentially a conservation principle applied on zero-energy (assigned to the ground state of vacuum) that mainly states a general quadratic equation governing a form of ex-nihilo creation and having a pair of conjugate boson-fermion mass solutions for each set of given coefficients. eZEH proposes a general formula for all the rest masses of all EPs from Standard model, also indicating the true existence of the graviton and a possible bijective connection between the three types of neutrinos (all predicted to be actually Majorana fermions) and the massless bosons (photon, gluon and the hypothetical graviton), between the electron/positron and the W boson, predicting at least three generations of leptoquarks (LQs) (defined here as the “mass-conjugates” of the three known generations of quarks) and predicting two distinct types of neutral massless fermions (NMFs) (modelled as mass-conjugates of the Higgs boson and Z boson respectively) which may be plausible constituents for a hypothetical lightest possible (hot fermionic) dark matter (LPDM) or, even more plausible, the main constituents of a superfluid fermionic vacuum/aether, as also proposed by the notorious Superfluid vacuum theory (SVT) (in which the physical vacuum is modeled as a bosonic/fermionic superfluid). SUSYA also predicts two hypothetical bosons defined as the ultra-heavy bosonic mass-conjugates of the muon and tauon called here the “W-muonic boson” (Wmb) and the “W-tauonic boson” (Wtb) respectively: Wmb and Wtb are predicted much heavier than the W boson and the Higgs boson so that Wmb and Wtb can be regarded as ultra-heavy charged Higgs bosons with their huge predicted rest energies defining the energy scale at which the electroweak field (EWF) may be unified with the Higgs field (HF).

scholarly journals THE MINIMAL SUPERSYMMETRIC STANDARD MODEL AND PRECISION OF W-BOSON MASS AND TOP QUARK MASS

1998 ◽  
Vol 13 (32) ◽  
pp. 2613-2620 ◽  
Author(s):  
KYUNGSIK KANG ◽  
SIN KYU KANG
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Top Quark ◽  
Quark Mass ◽  
W Boson ◽  
Boson Mass ◽  
Higgs Boson Mass ◽  
Top Quark Mass ◽  
Present Value ◽  
Central Values

We argue that the present value and accuracy of MW and mt measurements tend to favor the MSSM, provided that the central values of MW and mt stay at the current values, over the SM. By speculating that a precision of order 40 MeV and 3 GeV respectively for MW and mt will be achieved at LEP2 and Tevatron, we show that the prospect for the MSSM will be further enhanced as long as the central values of MW and mt do not increase below the present values. In addition, we discuss how this scenario can constrain the Higgs boson mass and distinguish the Higgs boson of the MSSM type from that of the SM.

scholarly journals A possibility of Lorentz violation in the Higgs sector

2019 ◽  
Vol 35 (10) ◽  
pp. 2050064 ◽  
Author(s):  
Satoshi Iso ◽  
Noriaki Kitazawa
Keyword(s):  
Higgs Boson ◽  
Dimensional Space ◽  
Higgs Field ◽  
Higgs Sector ◽  
Angular Frequency ◽  
Energy Scale ◽  
Boson Mass ◽  
Effective Theory ◽  
Higher Dimensional ◽  
Phenomenological Consequence

In string theory, a scalar field often appears as a moduli of a geometrical configuration of D-branes in higher-dimensional space. In the low energy effective theory on D-branes, the distance between D-branes is translated into the energy scale of the gauge symmetry breaking. In this paper, we study a phenomenological consequence of a possibility that the Higgs field is such a moduli field and the D-brane configuration is stabilized by a stationary motion, in particular, revolution of D-branes on which we live. Then, due to the Coriolis force, Higgs mode is mixed with the angular fluctuation of branes and the Lorentz symmetry is violated in the dispersion relation of the Higgs boson. The Higgs boson mass measurements at LHC experiments give an upper bound [Formula: see text][Formula: see text][Formula: see text] GeV for the angular frequency of the revolution of D-branes.

THE W BOSON MASS MEASUREMENT USING THE COLLIDER DETECTOR AT FERMILAB

2013 ◽  
Vol 28 (13) ◽  
pp. 1330018 ◽  
Author(s):  
YU ZENG
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
W Boson ◽  
Mass Measurement ◽  
Boson Mass ◽  
Future Perspective ◽  
Limiting Factor ◽  
Tevatron Collider ◽  
Final Measurement ◽  
The Standard Model

As one of the most important parameters in the Standard Model (SM), the mass of the W boson (mW) is currently the limiting factor in our ability to tighten the constraint on the mass of the Higgs boson (mH) within the SM framework. This review summarizes the world's most precise mW measurement to date using ~2.2 fb -1 data collected in [Formula: see text] collisions at [Formula: see text] with the CDF II detector at the Fermilab Tevatron Collider. This review will first describe the motivation for improving the precision of mW measurement, then present the details of this analysis, followed by the final measurement result and the future perspective.

scholarly journals STARTLING EQUIVALENCES IN THE HIGGS-GOLDSTONE SECTOR BETWEEN RADIATIVE AND LOWEST-ORDER CONVENTIONAL ELECTROWEAK SYMMETRY BREAKING

2005 ◽  
Vol 20 (27) ◽  
pp. 6241-6246 ◽  
Author(s):  
F. A. CHISHTIE ◽  
V. ELIAS ◽  
T. G. STEELE
Keyword(s):  
Higgs Boson ◽  
Symmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
Boson Mass ◽  
Higgs Boson Mass ◽  
Electroweak Symmetry ◽  
Decay Widths ◽  
Order Of Magnitude

For the Higgs boson mass of ~ 220 GeV expected to arise from radiative electroweak symmetry breaking, we find the same lowest-order expressions as would be obtained from conventional electroweak symmetry breaking, given the same Higgs boson mass, for Higgs-Goldstone sector scattering processes identified with [Formula: see text], [Formula: see text], as well as for Higgs boson decay widths [Formula: see text], H → ZLZL. The radiatively broken case, however, leads to an order of magnitude enhancement over lowest-order conventional symmetry breaking for scattering processes [Formula: see text], ZLZL → HH, as well as a factor of ~ 30 enhancement for HH → HH.

scholarly journals Softly fine-tuned Standard Model and the scale of inflation

2015 ◽  
Vol 30 (34) ◽  
pp. 1550179 ◽  
Author(s):  
Beste Korutlu
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Vacuum Energy ◽  
Higgs Field ◽  
Fine Tuning ◽  
Boson Mass ◽  
Microwave Background ◽  
Spacetime Curvature ◽  
Energy Formula ◽  
The Stability

The direct coupling between the Higgs field and the spacetime curvature, if finely tuned, is known to stabilize the Higgs boson mass. The fine-tuning is soft because the Standard Model (SM) parameters are subject to no fine-tuning thanks to their independence from the Higgs-curvature coupling. This soft fine-tuning leaves behind a large vacuum energy [Formula: see text] which inflates the Universe with a Hubble rate [Formula: see text], [Formula: see text] being the SM ultraviolet (UV) boundary. This means that the tensor-to-scalar ratio inferred from cosmic microwave background polarization measurements by BICEP2, Planck and others lead to the determination of [Formula: see text]. The exit from the inflationary phase, as usual, is accomplished via decays of the vacuum energy. Here, we show that, identification of [Formula: see text] with the inflaton, as a sliding UV scale upon the SM, respects the soft fine-tuning constraint and does not disrupt the stability of the SM Higgs boson.

scholarly journals Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
A. M. Sirunyan ◽  
◽  
A. Tumasyan ◽  
W. Adam ◽  
T. Bergauer ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Confidence Level ◽  
Branching Fraction ◽  
Vector Boson ◽  
Boson Mass ◽  
Higgs Boson Mass ◽  
Vector Boson Fusion ◽  
Upper Limit ◽  
The Standard Model

Abstract A search is presented for a Higgs boson that is produced via vector boson fusion and that decays to an undetected particle and an isolated photon. The search is performed by the CMS collaboration at the LHC, using a data set corresponding to an integrated luminosity of 130 fb−1, recorded at a center-of-mass energy of 13 TeV in 2016–2018. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for production via vector boson fusion and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a Higgs boson mass of 125 GeV, assuming the standard model production rates, the observed (expected) 95% confidence level upper limit on the branching fraction is 3.5 (2.8)%. This is the first search for such decays in the vector boson fusion channel. Combination with a previous search for Higgs bosons produced in association with a Z boson results in an observed (expected) upper limit on the branching fraction of 2.9 (2.1)% at 95% confidence level.

Sign in / Sign up

Export Citation Format

Share Document