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dc.contributor.authorKarasu Uysal, Ayben
dc.contributor.authorALICE, Collaboration
dc.date.accessioned2019-07-05T11:33:03Z
dc.date.available2019-07-05T11:33:03Z
dc.date.issued2015
dc.identifier.urihttps://hdl.handle.net/20.500.12498/517
dc.description.abstractThe measurement of the mass differences for systems bound by the strong force has reached a very high precision with protons and anti-protons1,2. The extension of such measure- ment from (anti-)baryons to (anti-)nuclei allows one to probe any difference in the interactions between nucleons and anti- nucleons encoded in the (anti-)nuclei masses. This force is a remnant of the underlying strong interaction among quarks and gluons and can be described by effective theories3, but cannot yet be directly derived from quantum chromodynamics. Here we report a measurement of the difference between the ratios ofthemassandchargeofdeuterons(d)andanti-deuterons(d ̄), and 3He and 3He nuclei carried out with the ALICE (A Large Ion Collider Experiment)4 detector in Pb–Pb collisions at a centre-of-mass energy per nucleon pair of 2.76 TeV. Our direct measurement of the mass-over-charge differences confirms CPT invariance to an unprecedented precision in the sector of light nuclei5,6. This fundamental symmetry of nature, which exchanges particles with anti-particles, implies that all physics laws are the same under the simultaneous reversal of charge(s) (charge conjugation C), reflection of spatial coordinates (parity transformation P) and time inversion (T).en_US
dc.relation10.1038/NPHYS3432en_US
dc.subjectlight nuclei and anti-nuclei mass difference, ALICE, LHCen_US
dc.titlePrecision measurement of the mass difference between light nuclei and anti-nucleien_US
dc.typeArticleen_US
eperson.orcidid0000-0001-6297-2532en_US


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