scholarly journals Trilinear gauge boson couplings in the standard model with one universal extra dimension

2013 ◽  
Vol 88 (1) ◽  
Author(s):  
M. A. López-Osorio ◽  
E. Martínez-Pascual ◽  
J. Montaño ◽  
H. Novales-Sánchez ◽  
J. J. Toscano ◽  
...  
Keyword(s):  
Standard Model ◽  
Gauge Boson ◽  
Extra Dimension ◽  
Universal Extra Dimension ◽  
The Standard Model ◽  
Gauge Boson Couplings

scholarly journals The Standard Model with one universal extra dimension

Pramana ◽  
2013 ◽  
Vol 80 (3) ◽  
pp. 369-412 ◽  
Author(s):  
A CORDERO-CID ◽  
M GÓMEZ-BOCK ◽  
H NOVALES-SÁNCHEZ ◽  
J J TOSCANO
Keyword(s):  
Standard Model ◽  
Extra Dimension ◽  
Universal Extra Dimension ◽  
The Standard Model

scholarly journals Quark-flavor-changing Higgs decays from a universal extra dimension

2020 ◽  
Vol 35 (24) ◽  
pp. 2050141
Author(s):  
Carlos M. Farrera ◽  
Alejandro Granados-González ◽  
Héctor Novales-Sánchez ◽  
J. Jesús Toscano
Keyword(s):  
Standard Model ◽  
Extra Dimension ◽  
New Physics ◽  
Tree Level ◽  
Universal Extra Dimension ◽  
Loop Level ◽  
Flavor Changing ◽  
The Standard Model ◽  
The One ◽  
Kaluza Klein

Kaluza–Klein fields characterizing, from a four-dimensional viewpoint, the presence of compact universal extra dimensions would alter low-energy observables through effects determined by some compactification scale, [Formula: see text], since the one-loop level, thus being particularly relevant for physical phenomena forbidden at tree level by the Standard Model. This paper explores, for the case of one universal extra dimension, such new-physics contributions to Higgs decays [Formula: see text], into pairs of quarks with different flavors, a sort of decay process which, in the Standard Model, strictly occurs at the loop level. Finite results, decoupling as [Formula: see text], are calculated. Approximate short expressions, valid for large compactification scales, are provided. We estimate that Kaluza–Klein contributions lie below predictions from the Standard Model, being about 2 to 3 orders of magnitude smaller for compactification scales within [Formula: see text].

scholarly journals EFFECTS OF UNIVERSAL EXTRA DIMENSIONS ON HIGGS SIGNALS AT LHC

2008 ◽  
Vol 23 (06) ◽  
pp. 823-834 ◽  
Author(s):  
SANTOSH KUMAR RAI
Keyword(s):  
Higgs Boson ◽  
Large Hadron Collider ◽  
Standard Model ◽  
Extra Dimension ◽  
Extra Dimensions ◽  
Hadron Collider ◽  
Beyond The Standard Model ◽  
Universal Extra Dimension ◽  
Major Focus ◽  
The Standard Model

A major focus at the Large Hadron Collider (LHC) will be on Higgs boson studies and it would be an interesting prospect to simultaneously probe for physics beyond the Standard Model in the Higgs signals. In this work we show as to what extent, the effects of universal extra dimension (UED) can be isolated at the LHC through the Higgs signals. By doing a detailed study of the different uncertainties involved in the measurement of the rates for the process pp →h →γγ, we estimate the extent to which these uncertainties can mask the effects of the contributions coming from UED.

scholarly journals TRILINEAR NEUTRAL GAUGE BOSON COUPLINGS

2001 ◽  
Vol 16 (30) ◽  
pp. 4891-4909 ◽  
Author(s):  
DEBAJYOTI CHOUDHURY ◽  
SUKANTA DUTTA ◽  
SUBHENDU RAKSHIT ◽  
SAURABH RINDANI
Keyword(s):  
Standard Model ◽  
Supersymmetric Standard Model ◽  
Minimal Supersymmetric Standard Model ◽  
Gauge Boson ◽  
Form Factors ◽  
Neutral Gauge Boson ◽  
The Standard Model ◽  
Vector Bosons ◽  
Gauge Boson Couplings

We study the CP even trilinear neutral gauge boson vertices at one-loop in the context of the Standard Model and the Minimal Supersymmetric Standard Model, assuming two of the vector bosons are on-shell. We also study the changes in the form-factors when these two bosons are off-shell.

scholarly journals DOUBLE-LEPTON POLARIZATION ASYMMETRIES IN B → K1l+l- DECAY IN UNIVERSAL EXTRA DIMENSION

2012 ◽  
Vol 27 (08) ◽  
pp. 1250036
Author(s):  
B. B. ŞIRVANLI
Keyword(s):  
Standard Model ◽  
Extra Dimension ◽  
Model Parameters ◽  
Experimental Measurements ◽  
Beyond The Standard Model ◽  
Universal Extra Dimension ◽  
The Standard Model ◽  
Lepton Polarization ◽  
Theoretical Results

The double-lepton polarization asymmetries for the exclusive B → K1l+l- transition is studied in the universal extra dimension. It is shown that most of the double-lepton polarization asymmetries are sensitive to the model parameters. Any experimental measurements on double-lepton polarizations and their comparison with theoretical results can give valuable information on the physics beyond the standard model.

KALUZA–KLEIN MODE CORRECTIONS TO $\bar{B}\rightarrow X_s\gamma$ IN ACD MODEL

2012 ◽  
Vol 27 (05) ◽  
pp. 1250011 ◽  
Author(s):  
TIE-JUN GAO ◽  
TAI-FU FENG ◽  
JIAN-BIN CHEN
Keyword(s):  
Numerical Analysis ◽  
Standard Model ◽  
Extra Dimension ◽  
Branching Ratio ◽  
Universal Extra Dimension ◽  
The Standard Model ◽  
Acd Model ◽  
Kaluza Klein

We discuss the corrections from the Kaluza–Klein (KK) modes to the branching ratio of the rare process [Formula: see text] in extension of the standard model with a universal extra dimension, which was proposed by Appelquist, Cheng and Dobrescu (ACD). Assuming 1/R≫mW, we sum over the series composed by the KK towers, and get the decoupling result in the limit 1/R→∞. The numerical analysis indicates that the corrections from the KK-excitations to the branching ratio of [Formula: see text] is about 3.5% as 1/R = 400 GeV .

CHARGED TGC FROM 1999 DELPHI DATA

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 299-301
Author(s):  
DIMITRIS FASSOULIOTIS
Keyword(s):  
Standard Model ◽  
Gauge Boson ◽  
Final States ◽  
Dipole Coupling ◽  
Quadrupole Coupling ◽  
The Standard Model ◽  
Model Predictions ◽  
Gauge Boson Couplings

Measurements of the trilinear gauge boson couplings WWγ and WWZ are presented from data taken by DELPHI in 1999 at an energy ranging from 192 to 202 GeV. Values are extracted with respect to [Formula: see text] and Δ κγ, the differences of the WWZ charge coupling and of the WWγ dipole coupling from their Standard Model values, and λγ, the WWγ quadrupole coupling. The study uses data from the final states jjℓν, jjjj, ℓX, jjX and γX, where j represents a quark jet, l an identified lepton and X missing four-momentum. The observations are consistent with the Standard Model predictions.

scholarly journals Flavour Anomalies in a U(1) SUSY Extension of the SM

Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 191
Author(s):  
Alexander Bednyakov ◽  
Alfiia Mukhaeva
Keyword(s):  
Standard Model ◽  
Parameter Space ◽  
Gauge Boson ◽  
New Physics ◽  
Low Energy ◽  
Effective Theory ◽  
The Standard Model ◽  
Meson Mixing ◽  
Additional Anomaly ◽  
Lepton Flavour

Flavour anomalies have attracted a lot of attention over recent years as they provide unique hints for possible New Physics. Here, we consider a supersymmetric (SUSY) extension of the Standard Model (SM) with an additional anomaly-free gauge U(1) group. The key feature of our model is the particular choice of non-universal charges to the gauge boson Z′, which not only allows a relaxation of the flavour discrepancies but, contrary to previous studies, can reproduce the SM mixing matrices both in the quark and lepton sectors. We pay special attention to the latter and explicitly enumerate all parameters relevant for our calculation in the low-energy effective theory. We find regions in the parameter space that satisfy experimental constraints on meson mixing and LHC Z′ searches and can alleviate the flavour anomalies. In addition, we also discuss the predictions for lepton-flavour violating decays B+→K+μτ and B+→K+eτ.

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