{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.165763.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2906994"}},{"@id":"https://doi.org/10.1007/JHEP10(2025)094","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ALICE Collaboration"},"creator":{"@type":"Organization","name":"ALICE Collaboration"},"datePublished":"2025","description":"The first measurement of prompt D$^{*+}$-meson spin alignment in ultrarelativistic heavy-ion collisions with respect to the direction orthogonal to the reaction plane is presented. The spin alignment is quantified by measuring the element $\u03c1_{00}$ of the diagonal spin-density matrix for prompt D$^{*+}$ mesons with $4<p_{\\rm T}<30$ GeV/$c$ in two rapidity intervals, $|y|<0.3$ and $0.3<|y|<0.8$, in central ($0-10$%) and midcentral ($30-50$%) Pb$-$Pb collisions at $\\sqrt{s_{\\rm NN}}=5.02$ TeV. Evidence of spin alignment $\u03c1_{00}>1/3$ has been found for $p_{\\rm T}>15$ GeV/$c$ and $0.3<|y|<0.8$ with a significance of $3.1\u03c3$. The measured spin alignment of prompt D$^{*+}$ mesons is compared with the one of inclusive J$/\u03c8$ mesons measured at forward rapidity ($2.5 < y < 4$).","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.165763.v1/t1","@type":"Dataset","description":"$\\rho_{00}$ of prompt D$^{*\\pm}$ mesons as a function of transverse momentum ($p_{\\rm T}$) in the rapidity interval $0.0 &lt; |y|...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.165763.v1/t2","@type":"Dataset","description":"$\\rho_{00}$ of prompt D$^{*\\pm}$ mesons as a function of transverse momentum ($p_{\\rm T}$) in the rapidity interval $0.3 &lt; |y|...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.165763.v1/t3","@type":"Dataset","description":"$\\rho_{00}$ of prompt D$^{*\\pm}$ mesons as a function of transverse momentum ($p_{\\rm T}$) in the rapidity interval $0.0 &lt; |y|...","name":"Table 3"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2906994?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/165763"}],"inLanguage":"en","name":"First measurement of D$^{*+}$ vector spin alignment in Pb-Pb collisions at $\\mathbf{\\sqrt{s_{\\rm NN}} = 5.02}$ TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2906994?version=1","version":1}