Measurement of the Cross Section for Electromagnetic Dissociation with Neutron Emission in Pb-Pb Collisions at $\sqrt{s_{NN}}$ = 2.76 TeV

The ALICE collaboration
Phys.Rev.Lett. 109 (2012) 252302, 2012.

Abstract (data abstract)
CERN-LHC. First measurements of neutron emission in electromagnetic dissociation of PB208 nuclei at the LHC. The measurement uses the neutron zero degree calorimeters of the ALICE experiment to detect neutral particles close to beam rapidity. Cross sections for single and mutual electromagnetic dissociation are given together with comparisons with the measured total hadronic cross section.

  • Table 1

    Data from T 1


    Single EMD -> at least one neutron is emitted by a given Pb nucleus disregarding the fate of the other...

  • Table 2

    Data from T 1


    Mutual EMD -> at least one neutron is emitted by both Pb nuclei.

  • Table 3

    Data from T 1


    Measurement of the total hadronic Pb-Pb cross section at 2.76 TeV per nucleon.

  • Table 4

    Data from T 2


    Measurement of the fractions of 1neutron (1n), 2 neutrons (2n), 3 neutrons (3n) events with respect to the total number...

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