he first study of the shapes of jets arising from bottom (b) quarks in heavy ion collisions is presented. Jet shapes are studied using charged hadron constituents as a function of their radial distance from the jet axis. Lead-lead (PbPb) collision data at a nucleon-nucleon center-of-mass energy of sNN=5.02TeV were recorded by the CMS detector at the LHC, with an integrated luminosity of 1.69nb−1. Compared to proton-proton collisions, a redistribution of the energy in b jets to larger distances from the jet axis is observed in PbPb collisions. This medium-induced redistribution is found to be substantially larger for b jets than for inclusive jets.
in a compositeness scenario. The analysis is performed using a sample of proton-proton collisions at
√s = 13 TeV recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity
of 138 fb−1. The data are found to be in agreement with the standard model prediction. For the process
in which the N is produced in association with a lepton, followed by the decay of the N to a sameflavor lepton and a quark pair, an upper limit at 95% confidence level on the product of the cross section
and branching fraction is obtained as a function of the N mass mN and the compositeness scale . For
this model the data exclude the existence of Ne (Nμ ) for mN below 6.0 (6.1) TeV, at the limit where mN
is equal to . For mN ≈ 1 TeV, values of  less than 20 (23) TeV are excluded. These results represent a considerable improvement in sensitivity, covering a larger parameter space than previous searches in pp collisions at 13 TeV
Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., Damanakis, K., et al. (2023). Search for a heavy composite Majorana neutrino in events with dilepton signatures from proton-proton collisions at √s=13 Tev. PHYSICS LETTERS. SECTION B, 843, 1-25 [10.1016/j.physletb.2023.137803].
Search for a heavy composite Majorana neutrino in events with dilepton signatures from proton-proton collisions at √s=13 Tev
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Vlasov, E; Vorobyev, A; Voytishin, N; Yuldashev, BS; Zarubin, A; Zhizhin, I; Zhokin, A
2023
Abstract
he first study of the shapes of jets arising from bottom (b) quarks in heavy ion collisions is presented. Jet shapes are studied using charged hadron constituents as a function of their radial distance from the jet axis. Lead-lead (PbPb) collision data at a nucleon-nucleon center-of-mass energy of sNN=5.02TeV were recorded by the CMS detector at the LHC, with an integrated luminosity of 1.69nb−1. Compared to proton-proton collisions, a redistribution of the energy in b jets to larger distances from the jet axis is observed in PbPb collisions. This medium-induced redistribution is found to be substantially larger for b jets than for inclusive jets.
in a compositeness scenario. The analysis is performed using a sample of proton-proton collisions at
√s = 13 TeV recorded by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity
of 138 fb−1. The data are found to be in agreement with the standard model prediction. For the process
in which the N is produced in association with a lepton, followed by the decay of the N to a sameflavor lepton and a quark pair, an upper limit at 95% confidence level on the product of the cross section
and branching fraction is obtained as a function of the N mass mN and the compositeness scale . For
this model the data exclude the existence of Ne (Nμ ) for mN below 6.0 (6.1) TeV, at the limit where mN
is equal to . For mN ≈ 1 TeV, values of less than 20 (23) TeV are excluded. These results represent a considerable improvement in sensitivity, covering a larger parameter space than previous searches in pp collisions at 13 TeV
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Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande. La presente simulazione è stata realizzata sulla base delle specifiche raccolte sul tavolo ER del Focus Group IRIS coordinato dall’Università di Modena e Reggio Emilia e delle regole riportate nel DM 589/2018 e allegata Tabella A. Cineca, l’Università di Modena e Reggio Emilia e il Focus Group IRIS non si assumono alcuna responsabilità in merito all’uso che il diretto interessato o terzi faranno della simulazione. Si specifica inoltre che la simulazione contiene calcoli effettuati con dati e algoritmi di pubblico dominio e deve quindi essere considerata come un mero ausilio al calcolo svolgibile manualmente o con strumenti equivalenti.