{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.166318.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2776333"}},{"@id":"https://doi.org/10.1016/j.physletb.2025.140006","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ALICE Collaboration"},"creator":{"@type":"Organization","name":"ALICE Collaboration"},"datePublished":"2025","description":"The intense photon fluxes from relativistic nuclei provide an opportunity to study photonuclear interactions in ultraperipheral collisions. The measurement of coherently photoproduced \\fourpi~final states in ultraperipheral $\\rm{Pb\\textendash Pb}$ collisions at \\fivenn~is presented for the first time. The cross section, d$\\sigma$/d$y$, times the branching ratio ($\\rho\\rightarrow \\pi^+ \\pi^+ \\pi^- \\pi^-$) is found to be $47.8\\pm2.3~\\rm{\\rm{(stat.)}}\\pm7.7~\\rm{\\rm{(syst.)}}$~mb in the rapidity interval $|y| < 0.5$. The invariant mass distribution is best described by the fit assuming two excited resonances, $\\rho(1450)$ and $\\rho(1700)$, and the interference term between them. The values of the masses ($m$) and widths ($\\Gamma$) of the resonances extracted from the fit are $m_{1}=1385\\pm14~\\rm{(stat.)}\\pm3~\\rm{(syst.)}$~\\MeVmass, $\\Gamma_{1}=431\\pm36~\\rm{(stat.)}\\pm82~\\rm{(syst.)}$~\\MeVmass, $m_{2}=1663\\pm13~\\rm{(stat.)}\\pm22~\\rm{(syst.)}$~\\MeVmass~and $\\Gamma_{2}=357~\\pm31~\\rm{(stat.)}\\pm49~\\rm{(syst.)}$ \\MeVmass, respectively. The measured cross sections times the branching ratios are compared to recent theoretical predictions.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.166318.v1/t1","@type":"Dataset","description":"Corrected invariant mass spectrum for the coherent four pion photoproduction","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.166318.v1/t2","@type":"Dataset","description":"Cross sections for exclusive four-pion production extracted from the single-resonance and two-resonance scenarios","name":"Table 2"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2776333?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/166318"}],"inLanguage":"en","name":"Exclusive four pion photoproduction in ultraperipheral 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/ins2776333?version=1","version":1}