Totem: on the Parameter at 13 TeV Ezhela, V. V.; Petrov, V. A.; Tkachenko, N. P.
Physics of atomic nuclei,
05/2021, Letnik:
84, Številka:
3
Journal Article
Recenzirano
The results on elastic proton–proton scattering that were obtained by the TOTEM Collaboration at the LHC (Large Hadron Collider) energy of 13 TeV are analyzed. It is shown that the statistical ...significance of these results is questionable in some respects. Specific examples show that the parameter
extracted from experimental data is model-dependent.
The results of a combined description of data on the differential and total scattering cross sections and the
-parameter for
collisions in tuning the parameters of an analytic model constructed in ...order to describe data over a broad region of kinematical variables for
GeV and all currently available experimental data on
are presented. The experimental data were taken from the COMPAS group (IHEP) compilations and the CLM compilations and were supplemented with data from the FNAL-COLLIDER-D0 and CERN-LHC-TOTEM experiments and with cosmic-ray data from the Pierre Auger Observatory (PAO).
Review of Particle Physics Workman, R L; Klempt, E; Agashe, K ...
Progress of theoretical and experimental physics,
08/2022, Letnik:
2022, Številka:
8
Journal Article
Recenzirano
Odprti dostop
Abstract
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured ...properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 120 reviews are many that are new or heavily revised, including a new review on Machine Learning, and one on Spectroscopy of Light Meson Resonances.
The Review is divided into two volumes. Volume 1 includes the Summary Tables and 97 review articles. Volume 2 consists of the Particle Listings and contains also 23 reviews that address specific aspects of the data presented in the Listings.
The complete Review (both volumes) is published online on the website of the Particle Data Group (pdg.lbl.gov) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print, as a web version optimized for use on phones, and as an Android app.
The results of a quantitative, statistically complete, description of the total-cross-section data obtained worldwide for hadron–hadron (photon–hadron) collisions and compiled in the Particle Data ...Group surveys are presented for several versions of a universal analytic parametrization of amplitudes for forward hadron–hadron (photon-hadron) scattering.
The experience of using the dynamic atlas of the experimental data and mathematical models of their description in the problems of adjusting parametric models of observable values depending on ...kinematic variables is presented. The functional possibilities of an image of a large number of experimental data and the models describing them are shown by examples of data and models of observable values determined by the amplitudes of elastic scattering of hadrons. The Internet implementation of an interactive tool DaMoScope and its interface with the experimental data and codes of adjusted parametric models with the parameters of the best description of data are schematically shown. The DaMoScope codes are freely available.
A critical overview of the current doubtful practice on presentation of correlated data in the physics literature and in the scientific and technological databases is presented. The simple rules to ...calculate the rounding thresholds to preserve the positive definiteness of the covariance and correlation matrices as well as the rounding thresholds for the components of the mean vector to keep them inside the "non-rounded" scatter region are formulated. Evidence that in the multivariate case there are severe limitations on the applicability of the linear differential law of uncertainty propagation is presented. The explicit relation of the number of input random variables I, the number of output variables D, and the order T of Taylor polynomials sufficient to preserve the self-consistent numerical presentation of the mean value of the vector function and its covariance matrix under nonlinear differential propagation procedure is obtained. It is stressed that the rounding thresholds for the safe rounding of correlated data impose the severe requirements on the storage and exchange formats of the correlated data that could not be met in the traditional publications on the paper but could be realized in the electronic media.
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