ALICE reports mass measurements of Ω−, Ξ− and antiparticles at ~60 ppm precision via invariant-mass reconstruction in pp collisions, calibrated on K0S and Λ, reducing lattice QCD scale uncertainty.
Masses, Lifetimes and Production Rates of Xi- and anti-Xi+ at LEP 1
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abstract
Measurements of the Xi- and anti-Xi+ masses, mass differences, lifetimes and lifetime differences are presented. The anti-Xi+ sample used is much larger than those used previously for such measurements. In addition, the Xi production rates in Z -> b anti-b and Z -> q anti-q events are compared and the position xi* of the maximum of the xi distribution in Z -> q anti-q events is measured.
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Precision mass measurements of multistrange baryons and their antiparticles
ALICE reports mass measurements of Ω−, Ξ− and antiparticles at ~60 ppm precision via invariant-mass reconstruction in pp collisions, calibrated on K0S and Λ, reducing lattice QCD scale uncertainty.