S-Z POWER SPECTRA

2008 ◽  
Vol 23 (17n20) ◽  
pp. 1498-1505 ◽  
Author(s):  
YOEL REPHAELI ◽  
SHARON SADEH
Keyword(s):  
Standard Model ◽  
Dark Energy Model ◽  
Density Fluctuation ◽  
Power Spectra ◽  
Observational Evidence ◽  
Clusters Of Galaxies ◽  
The Standard Model ◽  
Non Gaussian ◽  
Cluster Abundance ◽  
Good Agreement

There is some observational evidence for earlier evolution of clusters of galaxies than predicted in the standard ΛCDM model with a Gaussian primordial density fluctuation field, and a low value for the mass variance parameter (σ8). Particularly difficult in this model is the interpretation of possible excess CMB anisotropy on cluster scales as due to the Sunyaev-Zeldovich (S-Z) effect. We have calculated S-Z power spectra in the standard model, and in two alternative models which predict higher cluster abundance - a model with non-Gaussian PDF, and an early dark energy model. As anticipated, the levels of S-Z power in the latter two models are significantly higher than in the standard model, and in good agreement with current measurements of CMB anisotropy at high multipole values. Our results provide a sufficient basis for testing the viability of the three models by future high quality measurements of cluster abundance and the anisotropy induced by the S-Z effect.

scholarly journals Chiral anomaly in SU(2)R-axion inflation and the new prediction for particle cosmology

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Azadeh Maleknejad
Keyword(s):  
Standard Model ◽  
Symmetry Breaking ◽  
Particle Physics ◽  
Cosmological Parameters ◽  
Chiral Anomaly ◽  
Dark Matter Candidate ◽  
Neutrino Sector ◽  
Matter Creation ◽  
The Standard Model ◽  
Non Gaussian

Abstract Upon embedding the axion-inflation in the minimal left-right symmetric gauge extension of the SM with gauge group SU(2)L × SU(2)R × U(1)B−L, [1] proposed a new particle physics model for inflation. In this work, we present a more detailed analysis. As a compelling consequence, this setup provides a new mechanism for simultaneous baryogenesis and right-handed neutrino creation by the chiral anomaly of WR in inflation. The lightest right-handed neutrino is the dark matter candidate. This setup has two unknown fundamental scales, i.e., the scale of inflation and left-right symmetry breaking SU(2)R × U(1)B−L→ U(1)Y. Sufficient matter creation demands the left-right symmetry breaking scale happens shortly after the end of inflation. Interestingly, it prefers left-right symmetry breaking scales above 1010 GeV, which is in the range suggested by the non-supersymmetric SO(10) Grand Unified Theory with an intermediate left-right symmetry scale. Although WR gauge field generates equal amounts of right-handed baryons and leptons in inflation, i.e. B − L = 0, in the Standard Model sub-sector B − LSM ≠ 0. A key aspect of this setup is that SU(2)R sphalerons are never in equilibrium, and the primordial B − LSM is conserved by the Standard Model interactions. This setup yields a deep connection between CP violation in physics of inflation and matter creation (visible and dark); hence it can naturally explain the observed coincidences among cosmological parameters, i.e., ηB ≃ 0.3Pζ and ΩDM ≃ 5ΩB. The new mechanism does not rely on the largeness of the unconstrained CP-violating phases in the neutrino sector nor fine-tuned masses for the heaviest right-handed neutrinos. The SU(2)R-axion inflation comes with a cosmological smoking gun; chiral, non-Gaussian, and blue-tilted gravitational wave background, which can be probed by future CMB missions and laser interferometer detectors.

scholarly journals THE UNIT OF ELECTRIC CHARGE AND THE MASS HIERARCHY OF HEAVY PARTICLES

2007 ◽  
Vol 22 (38) ◽  
pp. 2909-2916
Author(s):  
G. LÓPEZ CASTRO ◽  
J. PESTIEAU
Keyword(s):  
Standard Model ◽  
Mass Hierarchy ◽  
Empirical Formulas ◽  
Heavy Particles ◽  
The Standard Model ◽  
Experimental Values ◽  
The One ◽  
Simple Ratio ◽  
The Masses ◽  
Good Agreement

We propose some empirical formulas relating the masses of the heaviest particles in the standard model (the W, Z, H bosons and the t quark) to the charge of the positron e and the Higgs condensate v. The relations for the masses of gauge bosons mW = (1+e)v/4 and [Formula: see text] are in good agreement with experimental values. By requiring the electroweak standard model to be free from quadratic divergences at the one-loop level, we find: [Formula: see text] and [Formula: see text], or the very simple ratio (mt/mH)2 = e.

CHARM DECAYS WITHIN THE STANDARD MODEL AND BEYOND

2006 ◽  
Vol 21 (08n09) ◽  
pp. 1697-1709 ◽  
Author(s):  
MARINA ARTUSO
Keyword(s):  
Standard Model ◽  
Charm Quark ◽  
New Physics ◽  
Charm Physics ◽  
Experimental Information ◽  
Charm Decays ◽  
Mixing Parameters ◽  
The Standard Model ◽  
The Status ◽  
Good Agreement

The charm quark has unique properties that make it a very important probe of many facets of the Standard Model. New experimental information on charm decays is becoming available from dedicated experiments at charm factories, and through charm physics programs at the b-factories and hadron machines. In parallel, theorists are working on matrix element calculations based on unquenched lattice QCD, that can be validated by experimental measurements and affect our ultimate knowledge of the quark mixing parameters. Recent predictions are compared with corresponding experimental data and good agreement is found. Charm decays can also provide unique new physics signatures; the status of present searches is reviewed. Finally, charm data relevant for improving beauty decay measurements are presented.

scholarly journals NONPERTURBATIVE EFFECTIVE MODEL FOR THE HIGGS SECTOR OF THE STANDARD MODEL

2010 ◽  
Vol 25 (32) ◽  
pp. 5865-5884 ◽  
Author(s):  
FABIO SIRINGO ◽  
LUCA MAROTTA
Keyword(s):  
Standard Model ◽  
Strong Coupling ◽  
Effective Potential ◽  
Higgs Sector ◽  
Effective Model ◽  
Scalar Theory ◽  
The Standard Model ◽  
Gaussian Effective Potential ◽  
Derivatives Of ◽  
Good Agreement

A nonperturbative effective model is derived for the Higgs sector of the Standard Model which is described by a simple scalar theory. The renormalized couplings are determined by the derivatives of the Gaussian effective potential that are known to be the sum of infinite bubble graphs contributing to the vertex functions. A good agreement has been found with strong coupling lattice simulations when a comparison can be made.

scholarly journals New physics in rare B decays after Moriond 2021

2021 ◽  
Vol 81 (10) ◽  
Author(s):  
Wolfgang Altmannshofer ◽  
Peter Stangl
Keyword(s):  
Standard Model ◽  
Global Analysis ◽  
New Physics ◽  
Two Dimensional ◽  
Contact Interactions ◽  
B Decays ◽  
Lepton Flavor ◽  
The Standard Model ◽  
Excellent Description ◽  
Non Gaussian

AbstractThe anomalies in rare B decays endure. We present results of an updated global analysis that takes into account the latest experimental input – in particular the recent results on $$R_K$$ R K and BR$$(B_s \rightarrow \mu ^+\mu ^-)$$ ( B s → μ + μ - ) – and that qualitatively improves the treatment of theory uncertainties. Fit results are presented for the Wilson coefficients of four-fermion contact interactions. We find that muon specific Wilson coefficients $$C_9 \simeq -0.73$$ C 9 ≃ - 0.73 or $$C_9 = -C_{10} \simeq -0.39$$ C 9 = - C 10 ≃ - 0.39 continue to give an excellent description of the data. If only theoretically clean observables are considered, muon specific $$C_{10} \simeq 0.60$$ C 10 ≃ 0.60 or $$C_9=-C_{10} \simeq -0.35$$ C 9 = - C 10 ≃ - 0.35 improve over the Standard Model by $$\sqrt{\Delta \chi ^2} \simeq 4.7\sigma $$ Δ χ 2 ≃ 4.7 σ and $$\sqrt{\Delta \chi ^2} \simeq 4.6\sigma $$ Δ χ 2 ≃ 4.6 σ , respectively. In various new physics scenarios we provide predictions for lepton flavor universality observables and CP asymmetries that can be tested with more data. We update our previous combination of ATLAS, CMS, and LHCb data on BR$$(B_s \rightarrow \mu ^+\mu ^-)$$ ( B s → μ + μ - ) and BR$$(B^0\rightarrow \mu ^+\mu ^-)$$ ( B 0 → μ + μ - ) taking into account the full two-dimensional non-Gaussian experimental likelihoods.

scholarly journals Nonassociative gauge fields

2021 ◽  
Vol 36 (23) ◽  
pp. 2150164
Author(s):  
E. K. Loginov
Keyword(s):  
Standard Model ◽  
Gauge Group ◽  
Higgs Mechanism ◽  
Gauge Fields ◽  
The Standard Model ◽  
Weinberg Angle ◽  
Good Agreement

In this paper, we study consequences of the assumption that the gauge group [Formula: see text] of the standard model is a nonassociative image of [Formula: see text]. Such an approach allows us to take a different look at the Higgs mechanism and obtain the value of the Weinberg angle in very good agreement with the experiment.

Data at the LHC

2018 ◽  
Author(s):  
John Campbell ◽  
Joey Huston ◽  
Frank Krauss
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Cross Sections ◽  
New Physics ◽  
Success Story ◽  
Experimental Knowledge ◽  
The Standard Model ◽  
Good Agreement

Cross sections have been measured over 14 orders of magnitude at the LHC, with good agreement in general with predictions from QCD and the Standard Model. The only grain of salt of this success story is that, up to now, no unambiguous signs of new physics has been spotted. The most visible discovery of the LHC (to date) has been that of the Higgs boson. In this book, the theoretical and experimental knowledge built up over the first 8 chapters is applied to physics at the LHC, and especially to measurements of the Higgs boson, and interpretations of its properties. Precision Standard Model measurements are used to search for, and constrain, the presence of new physics.

scholarly journals THE ROLE OF FINAL STATE INTERACTIONS IN ε′/ε

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 672-674 ◽  
Author(s):  
ELISABETTA PALLANTE ◽  
ANTONIO PICH ◽  
IGNAZIO SCIMEMI
Keyword(s):  
Standard Model ◽  
Model Prediction ◽  
Standard Model Prediction ◽  
Final State ◽  
The Standard Model ◽  
Final State Interactions ◽  
Good Agreement

The Standard Model prediction for ε′/ε is updated, taking into account the chiral loop corrections induced by final state interactions. The resulting value, ε′/ε =(17±6)×10-4, is in good agreement with present measurements.

scholarly journals Revisiting the flavor violating decays of the Tau and Mu leptons in the Standard Model with massive neutrinos

2019 ◽  
Author(s):  
Gerardo Hernández-Tomé
Keyword(s):  
Standard Model ◽  
Leptonic Decays ◽  
The Standard Model ◽  
Massive Neutrinos ◽  
Charged Leptons ◽  
Previous Prediction ◽  
Good Agreement ◽  
Made In

The flavor violating leptonic decays of the \tauτ and \muμ leptons into three lighter charged leptons are revisited in the framework the Standard Model with massive neutrinos. In contrast to the previous prediction, we have found strongly suppressed rates for the \tau^-\to \mu^- \ell^+ \ell^-τ−→μ−ℓ+ℓ− (\ell=\mu, eℓ=μ,e) decays. Our results are in good agreement with the approximation of neglecting masses and momenta of the external particles in the loop integrals made in the first computation for the \mu^- \to e^-e^+ e^-μ−→e−e+e− decay.

Indirect measurements in micro-space with the EM

1995 ◽  
Vol 53 ◽  
pp. 598-599
Author(s):  
Sterling P. Newberry
Keyword(s):  
Electron Microscope ◽  
Standard Model ◽  
Particle Physics ◽  
Information Storage ◽  
Storage Space ◽  
Indirect Measurements ◽  
Storage And Retrieval ◽  
Adequate Information ◽  
Compelling Reason ◽  
The Standard Model

At the 1958 meeting of our society, then known as EMSA, the author introduced the concept of microspace and suggested its use to provide adequate information storage space and the use of electron microscope techniques to provide storage and retrieval access. At this current meeting of MSA, he wishes to suggest an additional use of the power of the electron microscope.The author has been contemplating this new use for some time and would have suggested it in the EMSA fiftieth year commemorative volume, but for page limitations. There is compelling reason to put forth this suggestion today because problems have arisen in the “Standard Model” of particle physics and funds are being greatly reduced just as we need higher energy machines to resolve these problems. Therefore, any techniques which complement or augment what we can accomplish during this austerity period with the machines at hand is worth exploring.

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