scholarly journals Heavy $$Z^\prime $$ bosons in the secluded $$U(1)^\prime $$ model at hadron colliders

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
Mariana Frank ◽  
Levent Selbuz ◽  
Ismail Turan
Keyword(s):  
Experimental Data ◽  
Detailed Analysis ◽  
Prime Model ◽  
Hadron Colliders ◽  
Electroweak Scale ◽  
Relic Density ◽  
Vector Bosons ◽  
Supersymmetric Particles

AbstractWe study $$Z^{\prime }$$ Z ′ phenomenology at hadron colliders in an $$U(1)^{\prime }$$ U ( 1 ) ′ extended MSSM. We choose a $$U(1)^{\prime }$$ U ( 1 ) ′ model with a secluded sector, where the tension between the electroweak scale and developing a large enough mass for $$Z^{\prime }$$ Z ′ is resolved by incorporating three additional singlet superfields into the model. We perform a detailed analysis of the production, followed by decays, including into supersymmetric particles, of a $$Z^{\prime }$$ Z ′ boson with mass between 4 and 5.2 TeV, with particular emphasis on its possible discovery. We select three different scenarios consistent with the latest available experimental data and relic density constraints, and concentrate on final signals with $$2\ell +\not \! \! E_{T}$$ 2 ℓ + ⧸ E T , $$4\ell +\not \! \! E_{T}$$ 4 ℓ + ⧸ E T and $$6\ell +\not \! \! E_{T}$$ 6 ℓ + ⧸ E T . Including the SM background from processes with two, three or four vector bosons, we show the likelihood of observing a $$Z^\prime $$ Z ′ boson is not promising for the HL-LHC at 14 TeV. While at 27 and 100 TeV, the situation is more optimistic, and we devise specific benchmark scenarios which could be observed.

A study of genuine pion correlations and fluctuations in relativistic nucleus–nucleus collisions

2021 ◽  
Author(s):  
Imtiyaz A. Najar ◽  
W. Bari
Keyword(s):  
Experimental Data ◽  
Detailed Analysis ◽  
Experimental Results ◽  
Relativistic Nucleus ◽  
Particle Correlations ◽  
Projectile Nucleus ◽  
Urqmd Model

In this study, we have performed a detailed analysis of genuine pion correlations and fluctuations in terms of the normalized factorial comulant moments of second and third orders, [Formula: see text] and [Formula: see text], in case of [Formula: see text]O–AgBr interactions at [Formula: see text][Formula: see text]A and [Formula: see text][Formula: see text]A GeV/c. The experimental results are compared with the predictions of AMPT and UrQMD model simulated events. The UrQMD model reproduces the trends in experimental results but the strength of correlation is much smaller. However, the AMPT model does not also replicate all features of the experimental data. The genuine two-particle and three-particle correlations are found to become weaker with the increase in momentum of the projectile nucleus.

scholarly journals MODEL-INDEPENDENT ESTIMATES FOR THE ABELIAN Z′ BOSON AT MODERN HADRON COLLIDERS

2011 ◽  
Vol 26 (23) ◽  
pp. 4083-4100 ◽  
Author(s):  
ALEXEY GULOV ◽  
ANDREY KOZHUSHKO
Keyword(s):  
Experimental Data ◽  
Z Boson ◽  
Hadron Colliders ◽  
Present Experimental Data ◽  
Decay Widths ◽  
Model Independent

The model-independent constraints on the Abelian Z′ couplings from the LEP data are applied to estimate the Z′ production in experiments at the Tevatron and LHC. The Z′ total and partial decay widths are analyzed. The results are compared with model-dependent predictions and present experimental data from the Tevatron. If we assume the 1–2σ hints from the LEP data to be a signal of the Abelian Z′ boson, then the Tevatron data constrain the Z′ mass between 400 GeV and 1.2 TeV.

BARYOGENESIS IN AN SO(10) GUT MODEL WITH PATI–SALAM INTERMEDIATE SYMMETRY

1998 ◽  
Vol 13 (19) ◽  
pp. 1539-1546
Author(s):  
F. BUCCELLA ◽  
O. PISANTI ◽  
L. ROSA
Keyword(s):  
Experimental Data ◽  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Neutrino Oscillations ◽  
Baryon Asymmetry ◽  
Gauge Model ◽  
Electroweak Scale ◽  
Proton Lifetime ◽  
The Universe ◽  
Breaking Scale

The possibility of generating the observed baryon asymmetry of the universe in an SO(10) gauge model with spontaneous symmetry breaking pattern [Formula: see text] is studied. We find it possible to generate a [Formula: see text], converting the leptonic number produced at the B- L breaking scale via the B+L violating processes mediated by sphalerons at the electroweak scale. The resulting picture is tested against the limit coming from experimental data: proton lifetime and neutrino oscillations.

scholarly journals J/ψ, ψ′ AND ϒ PRODUCTION AT HADRON COLLIDERS: A REVIEW

2006 ◽  
Vol 21 (19n20) ◽  
pp. 3857-3915 ◽  
Author(s):  
JEAN-PHILIPPE LANSBERG
Keyword(s):  
Experimental Data ◽  
Present Status ◽  
High Energy ◽  
Experimental Measurements ◽  
Color Singlet ◽  
Hadron Colliders ◽  
Direct Production ◽  
Quarkonium Production ◽  
Energy Hadron ◽  
Hadron Duality

We give an overview of the present status of knowledge of the production of J/ψ, ψ′ and ϒ in high-energy hadron collisions. We first present two early models, namely the Color-Singlet Model (CSM) and the Color-Evaporation Model (CEM). The first is the natural application of pQCD to quarkonium production and has been shown to fail dramatically to describe experimental data, the second is its phenomenological counterpart and was introduced in the spirit of the quark–hadron duality in the late 1970's. Then, we expose the most recent experimental measurements of J/ψ, ψ′ and ϒ prompt and direct production at nonzero pTfrom two high-energy hadron colliders, the Tevatron and RHIC. In a third part, we review six contemporary models describing J/ψ, ψ′ and ϒ production at nonzero pT.

scholarly journals Indicators of Technical and Tactical Actions of Qualified Air Rifle Shooters

2019 ◽  
Vol 19 (4) ◽  
pp. 186-192
Author(s):  
A. P. Demichkovskyi
Keyword(s):  
Experimental Data ◽  
Detailed Analysis ◽  
Research Methods ◽  
Execution Time ◽  
Total Execution Time ◽  
Motor Abilities ◽  
Competitive Activity ◽  
Time Parameters ◽  
The Difference ◽  
Air Rifle

The purpose of the study was to define informative indicators of technical and tactical actions of qualified rifle shooting athletes. Materials and methods. The study involved MSU (number of athletes n = 10), CMSU (number of athletes n = 9). To solve the tasks set, the following research methods were used: analysis and generalization of scientific and methodological literature, pedagogical observation. Pedagogical observation was used to study the peculiarities of technical and tactical indicators of qualified athletes, as well as their motor abilities; methods of mathematical statistics were used to process the experimental data. Results. A detailed analysis of competitive activity made it possible to determine that the shot phases “Aiming”, “Shot execution – active shot”, “Preparation for the shot” are informative indicators of technical and tactical actions of qualified rifle shooting athletes. The study determined time parameters of the phases during competitive activity. The difference between the average indicators of the athletes with different sports qualifications is at the limit of 2.55 seconds, which suggests that the duration of the restorative processes of the shooter’s body affects the performance of each shot.  Conclusions. A detailed analysis of air rifle shooting among men during competitive activity allowed to determine the difference in technical and tactical fitness between the athletes with different sports qualifications of MSU and CMSU levels: “Aiming” – MSU 950.56 seconds, CMSU 1017.91 seconds; “Shot execution – active shot” – MSU 964.45 seconds, CMSU 952.36 seconds; “Preparation for the shot” – MSU 1678.66 seconds, CMSU 1855.19 seconds, “Total execution time” – MSU 3593.68 seconds, CMSU 3825.47 seconds.

Obstetric Analgesia and Anesthesia

PEDIATRICS ◽  
1949 ◽  
Vol 3 (6) ◽  
pp. 869-869
Author(s):  
HERMAN YANNET
Keyword(s):  
Experimental Data ◽  
Detailed Analysis ◽  
Present Status ◽  
Obstetric Analgesia ◽  
Fetal Respiration

This book is an excellently developed presentation of the present status of pain-relieving drugs in obstetrics. It is divided into two sections: The first is devoted to (1) detailed analysis of clinical and experimental data referrable to fetal respiration, and (2) pathologic pulmonary conditions in the fetus and newborn that might be causally related to the labor inhibiting and respiratory depressive effects of many, if not all, the pain-relieving drugs used during delivery. The scope of the section is indicated by some of the chapter headings, i.e., incidence of respiratory injury before birth; respirations before birth; intrauterine pneumonia; atelectasis; asphyxia.

scholarly journals Studies in the dynamics of disinfection VIII. The effect of lethal temperatures on standard cultures of Bact. Coli. I. A detailed analysis of the variations of death-rate with time

1947 ◽  
Vol 45 (2) ◽  
pp. 136-143 ◽  
Author(s):  
R. C. Jordan ◽  
S. E. Jacobs ◽  
H. E. F. Davies
Keyword(s):  
Experimental Data ◽  
Detailed Analysis ◽  
Death Rate ◽  
Financial Assistance ◽  
Regression Coefficients ◽  
Standard Errors ◽  
Full Time ◽  
Original Population ◽  
Lethal Temperatures ◽  
Treat All

1. Whole cultures of Bact. coli grown under carefully controlled conditions have been subjected to the action of heat at temperatures ranging from 47 to 55° C. and the survivor curves determined.2. The occurrence of excessive variation between replicate plates of counts made when the mortality exceeds 95 % was very much less evident than when phenol was the lethal agent.3. At temperatures of 35° C. and below, disinfection of the cultures was never complete, as a permanent population of cells became established. In some cases the numbers of heat-resistant cells reached nearly 0·01 % of the original population, but great fluctuations were observed.4. The death-rate during the active part of the disinfection was not constant but, in general, increased with time. In the faster disinfections this increase was difficult to detect and the logarithmic death-rate appeared to be virtually constant, but the increase is nevertheless believed to have been present in all cases.5. The data for all the experiments have been combined to give a composite disinfection curve from which it was concluded that the death-rate was low at first but rose to a maximum at which it remained constant until the mortality had reached at least 99·99%.6. This finding led to the decision to treat all the experiments as if the regression of log survivors on time had been linear between mortalities of 90 and 99·99%. The standard errors of the calculated regression coefficients were small, so that this method of treating the experimental data appears to be justified.The authors wish to express their gratitude to Messrs I.C.I. (Pharmaceuticals) Ltd. for their valuable financial assistance, which has enabled one of us (H. E. F. D.) to devote his full time to this work.

Evaluation of soil thermal conductivity models

2015 ◽  
Vol 52 (11) ◽  
pp. 1892-1900 ◽  
Author(s):  
D. Barry-Macaulay ◽  
A. Bouazza ◽  
B. Wang ◽  
R.M. Singh
Keyword(s):  
Experimental Data ◽  
Thermal Conductivity ◽  
Detailed Analysis ◽  
Soil Parameters ◽  
Soil Thermal Conductivity ◽  
Moisture Contents ◽  
Saturated Sands ◽  
Good Agreement ◽  
Different Soils ◽  
Conductivity Models

Numerous models have been developed to predict the thermal conductivity of soils at a range of different densities and moisture contents. This paper evaluates four thermal conductivity models, developed by various researchers, by comparing their performance against experimental results obtained on 27 different soils prepared at a range of saturation levels and densities. The results demonstrate that, in general, all four models show good agreement between experimental thermal conductivity and modelled thermal conductivity. The only significant shortfall is observed in low-saturated sands when using two of the models. A detailed analysis of the empirical soil parameters used in three of the recent models is presented. It shows that the accuracy of the three models can be improved by modifying the empirical soil parameters to fit the experimental data.

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