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Recent results on (anti-)(hyper-)nuclei production in pp, p-Pb and Pb-Pb collisions with ALICE

The ALICE Collaboration has collected a large data sample of Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV in 2015 at the Large Hadron Collider (LHC), which is complementary to that at $\sqrt{s_{\rm{NN}}}$ = 2.76 TeV from Run 1. In these collisions, a great variety of (anti-)(hyper-)nuclei is...

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Autor principal: Trogolo, Stefano
Lenguaje:eng
Publicado: SISSA 2018
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.314.0200
http://cds.cern.ch/record/2671906
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author Trogolo, Stefano
author_facet Trogolo, Stefano
author_sort Trogolo, Stefano
collection CERN
description The ALICE Collaboration has collected a large data sample of Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV in 2015 at the Large Hadron Collider (LHC), which is complementary to that at $\sqrt{s_{\rm{NN}}}$ = 2.76 TeV from Run 1. In these collisions, a great variety of (anti-)(hyper-)nuclei is produced, namely deuteron, triton, $^3$He, $^4$He, hypertriton ($^3_{\Lambda}$H) and their antiparticles. Furthermore, the high quality data sample of pp collisions at $\sqrt{s}$ = 7 TeV and 13 TeV and p-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV, collected at the LHC, allows for a systematic study of the light (anti-)nuclei production in different collision systems.ALICE has excellent particle identification (PID) capabilities which allow for the detection of these rarely produced particles. PID is performed using several techniques, namely by exploiting the measurement of the specific energy-loss in the Time Projection Chamber (TPC) and the information of the Time-Of-Flight (TOF) detector. In addition, the Inner Tracking System (ITS) is used to distinguish secondary vertices originating from weak decays. This is extremely important for the measurement of (anti-)hypertriton which has a decay length of several centimeters. The decay mode into 2-body ($^3_{\Lambda}$H $\rightarrow ^3$He + $\pi^-$) is the one with the highest reconstruction efficiency, but the largest branching ratio is given by the 3-body decay channel ($^3_{\Lambda}$H $\rightarrow$ d + p + $\pi^-$). Emphasis will be put on new results on nuclei production as a function of transverse momentum and multiplicity in all the collision systems as well as on the latest and more precise measurement of the hypertriton lifetime. The results on (hyper-)nuclei production are compared with predictions from a model based on coalescence mechanism and from statistical-thermal models. The goal is to study the (hyper-)nuclei production mechanisms in heavy-ion collisions (Pb-Pb) and to compare them to those in small collision (pp, p-Pb) systems.
id oai-inspirehep.net-1664253
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
publisher SISSA
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spelling oai-inspirehep.net-16642532021-05-03T07:54:23Zdoi:10.22323/1.314.0200http://cds.cern.ch/record/2671906engTrogolo, StefanoRecent results on (anti-)(hyper-)nuclei production in pp, p-Pb and Pb-Pb collisions with ALICEParticle Physics - ExperimentNuclear Physics - ExperimentThe ALICE Collaboration has collected a large data sample of Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV in 2015 at the Large Hadron Collider (LHC), which is complementary to that at $\sqrt{s_{\rm{NN}}}$ = 2.76 TeV from Run 1. In these collisions, a great variety of (anti-)(hyper-)nuclei is produced, namely deuteron, triton, $^3$He, $^4$He, hypertriton ($^3_{\Lambda}$H) and their antiparticles. Furthermore, the high quality data sample of pp collisions at $\sqrt{s}$ = 7 TeV and 13 TeV and p-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV, collected at the LHC, allows for a systematic study of the light (anti-)nuclei production in different collision systems.ALICE has excellent particle identification (PID) capabilities which allow for the detection of these rarely produced particles. PID is performed using several techniques, namely by exploiting the measurement of the specific energy-loss in the Time Projection Chamber (TPC) and the information of the Time-Of-Flight (TOF) detector. In addition, the Inner Tracking System (ITS) is used to distinguish secondary vertices originating from weak decays. This is extremely important for the measurement of (anti-)hypertriton which has a decay length of several centimeters. The decay mode into 2-body ($^3_{\Lambda}$H $\rightarrow ^3$He + $\pi^-$) is the one with the highest reconstruction efficiency, but the largest branching ratio is given by the 3-body decay channel ($^3_{\Lambda}$H $\rightarrow$ d + p + $\pi^-$). Emphasis will be put on new results on nuclei production as a function of transverse momentum and multiplicity in all the collision systems as well as on the latest and more precise measurement of the hypertriton lifetime. The results on (hyper-)nuclei production are compared with predictions from a model based on coalescence mechanism and from statistical-thermal models. The goal is to study the (hyper-)nuclei production mechanisms in heavy-ion collisions (Pb-Pb) and to compare them to those in small collision (pp, p-Pb) systems.SISSAoai:inspirehep.net:16642532018
spellingShingle Particle Physics - Experiment
Nuclear Physics - Experiment
Trogolo, Stefano
Recent results on (anti-)(hyper-)nuclei production in pp, p-Pb and Pb-Pb collisions with ALICE
title Recent results on (anti-)(hyper-)nuclei production in pp, p-Pb and Pb-Pb collisions with ALICE
title_full Recent results on (anti-)(hyper-)nuclei production in pp, p-Pb and Pb-Pb collisions with ALICE
title_fullStr Recent results on (anti-)(hyper-)nuclei production in pp, p-Pb and Pb-Pb collisions with ALICE
title_full_unstemmed Recent results on (anti-)(hyper-)nuclei production in pp, p-Pb and Pb-Pb collisions with ALICE
title_short Recent results on (anti-)(hyper-)nuclei production in pp, p-Pb and Pb-Pb collisions with ALICE
title_sort recent results on (anti-)(hyper-)nuclei production in pp, p-pb and pb-pb collisions with alice
topic Particle Physics - Experiment
Nuclear Physics - Experiment
url https://dx.doi.org/10.22323/1.314.0200
http://cds.cern.ch/record/2671906
work_keys_str_mv AT trogolostefano recentresultsonantihypernucleiproductioninppppbandpbpbcollisionswithalice