{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.60018.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/884808"}},{"@id":"https://doi.org/10.1007/JHEP05(2011)029","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2012","description":"CERN-LHC. Measurments of the Bose-Einstein correlations (BEC) between pairs of identical particles produced in proton-proton collisions at centre-of-mass energies of 0.9 and 7 TeV. The data used are minimum-bias events (4.2M at 0.9 TeV and 2.7M at 7 TeV)  with charged particles  required to have |eta| < 2.4 and PT > 200MeV.  The following is a definition of the quantity measured:\n\nR_double is defined as ratio between (DN/DQ)/(DNref/DQ) and the equivalent quantity from simulated Monte Carlo events (without BEC effects), where N is the number of 'real' events and Nref the number 'reference' events derived from combining identical particles from different events with similar charged particle  multiplicites and in similar pseudorapidity regions.  Q is the Lorentz-invariant quantity equal to the  square-root of the negative squared difference in four momentum of the two identical particles.    Assuming the particles to be predominantly pions, this is equal to the square-root of the difference in the squared invariant mass of the two particles and 4*the pion mass squared.\n\nThe data shows an enhancement of the number of pairs of same-sign charged particles with small relative momentum, the dependence of which is studied on kinematic and topological features.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.60018.v1/t1","@type":"Dataset","description":"The double ratio R_double at 900 and 7000 GeV.","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.60018.v1/t2","@type":"Dataset","description":"The double ratio R_double at 7000 GeV in different bins of charged particle multiplicity and kT.","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.60018.v1/t3","@type":"Dataset","description":"The double ratio R_double at 7000 GeV in different bins of charged particle multiplicity and kT.","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.60018.v1/t4","@type":"Dataset","description":"The double ratio R_double at 7000 GeV in different bins of charged particle multiplicity and kT.","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.60018.v1/t5","@type":"Dataset","description":"The double ratio R_double at 7000 GeV in different bins of charged particle multiplicity.","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.60018.v1/t6","@type":"Dataset","description":"Parameters of the fit to the double ratio R_double at 900 GeV.","name":"Table 6"},{"@id":"https://doi.org/10.17182/hepdata.60018.v1/t7","@type":"Dataset","description":"Parameters of the fit to the double ratio R_double at 7000 GeV.","name":"Table 7"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins884808?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/60018"}],"inLanguage":"en","name":"Measurement of Bose-Einstein Correlations in pp Collisions at sqrt(s)=0.9 and 7 TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins884808?version=1","version":1}