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20th LOMONOSOV CONFERENCE ON ELEMENTARY PARTICLE PHYSICS
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Multiplicity and Net-Charge Fluctuations in Ion+Ion Collisions at the SPS Energies
Agnieszka Borucka (for the NA61/SHINE Collaboration) E-mail: agnieszka.elzbieta.borucka@cern.ch
Faculty of Physics, Warsaw University of Technology. Warsaw, Poland-Received January 9, 2022
This contribution presents new results of NA61/SHINE on multiplicity and net-charge fluctuations measured with higher-order moments. It includes both rapidity dependence in p+p interactions as well as system size and energy dependence with Be+Be and Ar+Sc interactions. Obtained results are compared with the available data from other experiments and from models.
Keywords: NA61/SHINE, fluctuations, higher order moments, critical point.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 178-179.
Higgs Physics with Future Linear Colliders
I. Bozovic-Jelisavcic E-mail: ibozovic@vin.bg.ac.rs
«VINCA» Institute of Nuclear Sciences-National Institute of the Republic of Serbia, University of Belgrade.
Belgrade, Serbia
Received April 1, 2022
This paper, based on the invited talk at the 20th Lomonosov Conference of Elementary Particle Physics, provides short overview of the Higgs physics program at future linear colliders as Higgs factories.
Keywords: Linear Collider, Higgs.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 180-183.
Highlights of Top Quark Measurements with the ATLAS Experiment
Fabio Cardillo (ATLAS Collaboration) E-mail: fabio.cardillo@cern.ch
Instituto de Fisica Corpuscular (IFIC), Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain
Received January 16, 2022
Measurements of processes involving single top quarks or top-quark-antiquark pairs are of major importance to check the predictions of the Standard Model or to provide sensitivity to new physics beyond the Standard Model. In the recent years, the ATLAS experiment at the Large Hadron Collider performed precise measurements of top-quark related properties and also measured more complex Standard Model processes associated with top quarks, which have typically very low cross sections compared to the main production modes at the Large Hadron Collider. On this subject, some of the most relevant results released by the ATLAS collaboration in 2021 are presented: the inclusive and differential cross-section measurement of top-quark-antiquark production in association with a Z boson, the cross-section measurement of four top-quark production, the fiducial and differential measurement of the top-quark-antiquark cross section with high transverse momenta of the top quarks, as well as the polarisation measurement of single top quarks (antiquarks) produced in the t-channel.
Keywords: LHC, HEP, ATLAS, top physics, top quarks, cross section, polarisation, EFT.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 184-188.
Rare Decays at LHCb
Jacopo Cerasoli (on behalf of the LHCb collaboration) E-mail: jacopo.cerasoli@cern.ch
Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France Received January 16, 2022
The Standard Model (SM) of particle physics is the most advanced theory describing the behaviour and interactions of elementary particles. Despite passing an impressive amount of experimental tests, several deviations from the SM predictions have been observed in recent years in measurements of observables related to rare b-hadron decays, prompting great interest and motivating further investigations. A collection of selected recent results obtained by the LHCb collaboration on the study of rare b-hadron decays is presented in these proceedings.
Keywords: rare decays, LHCb, Standard Model, lepton flavour universality, new physics.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 189-190.
