{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.153848.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2724193"}},{"@id":"https://doi.org/10.1016/j.physletb.2024.138943","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ALICE Collaboration"},"creator":{"@type":"Organization","name":"ALICE Collaboration"},"datePublished":"2024","description":"In this letter, measurements of (anti)alpha production in central (0-10%) Pb--Pb collisions at a center-of-mass energy per nucleon--nucleon pair of $\\sqrt{s_{\\mathrm{NN}}}$ = 5.02 TeV are presented, including the first measurement of an antialpha transverse-momentum spectrum. Owing to its large mass, (anti)alpha production yields and transverse-momentum spectra are of particular interest because they provide a stringent test of particle production models. The averaged antialpha and alpha spectrum is included into a common blast-wave fit with lighter particles, indicating that the (anti)alpha also participates in the collective expansion of the medium created in the collision. A blast-wave fit including only protons, (anti)alpha, and other light nuclei results in a similar flow velocity as the fit that includes all particles. A similar flow velocity, but a significantly larger kinetic freeze-out temperature is obtained when only protons and light nuclei are included in the fit. The coalescence parameter $B_4$ is well described by calculations from a statistical hadronization model but significantly underestimated by calculations assuming nucleus formation via coalescence of nucleons. Similarly, the (anti)alpha-to-proton ratio is well described by the statistical hadronization model. On the other hand, coalescence calculations including approaches with different implementations of the (anti)alpha substructure tend to underestimate the data.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.153848.v1/t1","@type":"Dataset","description":"Antialpha spectrum in 0-10% V0M centrality class","name":"Antialpha spectrum"},{"@id":"https://doi.org/10.17182/hepdata.153848.v1/t2","@type":"Dataset","description":"Alpha spectrum in 0-10% V0M centrality class","name":"Alpha spectrum"},{"@id":"https://doi.org/10.17182/hepdata.153848.v1/t3","@type":"Dataset","description":"Average alpha and antialpha spectrum in 0-10% V0M centrality class","name":"Average alpha+antialpha spectrum"},{"@id":"https://doi.org/10.17182/hepdata.153848.v1/t4","@type":"Dataset","description":"Coalescence parameter $B_4$ from average alpha and antialpha as a function of $p_{\\mathrm{T}}$ in 0-10% V0M centrality class","name":"Coalescence B_4 from average alpha+antialpha"},{"@id":"https://doi.org/10.17182/hepdata.153848.v1/t5","@type":"Dataset","description":"Average alpha and antialpha over proton ratio in Pb-Pb collisions as a function of the charged particle multiplicity density at...","name":"Average alpha+antialpha over proton ratio"},{"@id":"https://doi.org/10.17182/hepdata.153848.v1/t6","@type":"Dataset","description":"pT-integrated yield of antialpha in Pb-Pb collisions in 0-10% V0M centrality class","name":"Yield antialpha"},{"@id":"https://doi.org/10.17182/hepdata.153848.v1/t7","@type":"Dataset","description":"pT-integrated yield of alpha in Pb-Pb collisions in 0-10% V0M centrality class","name":"Yield alpha"},{"@id":"https://doi.org/10.17182/hepdata.153848.v1/t8","@type":"Dataset","description":"pT-integrated yield of average alpha and antialpha in Pb-Pb collisions in 0-10% V0M centrality class","name":"Yield average alpha+antialpha"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2724193?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/153848"}],"inLanguage":"en","name":"Measurement of (anti)alpha production in central Pb-Pb collisions at $\\sqrt{s_{\\rm NN}}$ = 5.02 TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2724193?version=1","version":1}