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Probing of X, Y, Z exotics with hadron and heavy ion collisions
Get PDFThe possibility of selected studies of heavy exotic hadrons called X, Y, Z states is considered. The topic includes detailed analysis of their strong, weak and electromagnetic decays containing cc¯ pair, physics simulations and event
reconstruction at NICA facilit
Measurement of the differential cross section of neutron scattering on deuterium in the neutron energy range from 400 keV to 2.5 MeV
Get PDFThe angular distribution of n-d scattering was investigated in the energy range from 400 keV to 2.5 MeV using the recoil detection method, irradiating a proportional counter filled with deuterated gases with monoenergetic neutrons. Several techniques were employed to minimise the contribution of photons to the pulse-height distributions. A dedicated Monte Carlo model was developed to determine the differential cross section that best reproduces the measurements. The results are compared with the theoretical calculation of Canton et al. and the ENDF/B-VII.1 evaluation
Study of few-body nuclei by Feynman’s continual integrals and hyperspherical functions
Get PDFFeynman’s continual integrals method for solving N-body ground state problem was implemented using parallel computing. The correctness of calculations for 3-body systems 6Li, 12C was checked by comparison with the results of the expansion into hyperspherical functions. New effective method for the solution of the system of hyperradial equations with cubic splines approximation is used. Feynman’s continual integrals method was also used to study the 7Li nucleus as a
4-body system
Measurement of CP violation in charmless charged two-body B0 (s)-meson decays at LHCb
Get PDFCharmless charged two-body b-hadron decays to final states with kaons and pions are good for testing the Standard Model. In addition, they are sensitive to new physics beyond the Standard Model since they occur trough loop diagrams. We report the most recent results on the charmless b-hadron twobody decays obtained by the LHCb experiment using the data collected in the full Run 1 (3 fb−1)
Search for exotic processes with the NA62 experiment
Get PDFNA62 is a fixed target experiment at the CERN SPS which aims
at measuring the branching fraction of the ultra-rare decay K+ → π+νν¯ with an unprecedented precision. With its high-energy beam and a hermetic detector coverage, NA62 has also the opportunity to directly search for a plethora of long-lived exotic particles, such as heavy neutral leptons, axion-like particles and dark photons. We will review the status of such searches and give prospects for future data taking at NA62
Measurement of the time-integrated CP asymmetry in D0 → K0 SK0 S decays at LHCb
Get PDFThe D0 → K0 SK0 S decay is a promising discovery channel for CP violation in charm. A prediction based on the Standard Model gives an upper limit for the CP asymmetry of about 1% and further enhancements could result from
contributions from physics beyond the Standard Model. A preliminary measurement of the time-integrated CP asymmetry in prompt D0 → K0 SK0 S decays is presented, performed using data collected with the LHCb experiment in 2015 and 2016 at a 13 TeV pp center-of-mass energy (Run 2). The CP asymmetry is measured to be ACP (D0 → K0 SK0 S) = (0.042±0.034±0.010), where the first uncertainty is statistical and the second is systematic. This result represents a significant improvement with respect to the previous LHCb Run 1 measurement
Higgs searches in the forward region of pp collisions
Get PDFThe LHCb experiment offers a complementary phase space with
respect to ATLAS and CMS to study the H → b¯b and H → cc¯ decays, thanks to the forward acceptance and the large bandwidth of the trigger allowing low energy thresholds. In this contribution the latest study on b¯b resonances and the searches for H → b¯b and H → cc¯ performed by the LHCb Collaboration are presented
Strategies for new measurements in the V H, H → bb channel in ATLAS
Get PDFThe analysis of the data collected by the ATLAS detector for the search of the associate production of a Higgs boson decaying in b¯b and a W or Z boson decaying leptonically is briefly described. This analysis led in 2017 to the first evidence of the Higgs boson decaying in b¯b. The same analysis channel can be used in the so-called Simplified Template Cross-Section Framework to extract information on the Higgs couplings and eventually on their variations due to Beyond the Standard Model physics effects
Neutrino mass eigenstates and their ordering: A Bayesian approach
Get PDFOne of the not-yet determined properties of neutrinos is the ordering of their mass eigenstates. We combine the available data from neutrino oscillations, neutrinoless double beta decay and Cosmic Microwave Background observations to derive robust constraints on the mass ordering in a Bayesian context. This work is based on the paper by Gariazzo S. et al., JCAP, 03 (2018) 011
