Abstract
A measurement of {{D}} ^0 meson production by the LHCb experiment in its fixed-target configuration is presented. The production of {{D}} ^0 mesons is studied with a beam of 2.5 ,text {Tehspace{-1.00006pt}V} protons colliding on a gaseous neon target at rest, corresponding to a nucleon–nucleon centre-of-mass energy of sqrt{s_{scriptscriptstyle text {NN}}} = 68.5,,text {Gehspace{-1.00006pt}V} . The sum of the {{D}} ^0 and {hspace{0.0pt}overline{hspace{0.0pt}{D}}} {}^0 production cross-section in ptext {Ne} collisions in the centre-of-mass rapidity range y^{star }in [-2.29, 0] is found to be sigma _{D^{0}}^{y^star in [-2.29, 0]} = 48.2 pm 0.3 pm 4.5 ,upmu text {b}/text {nucleon} where the first uncertainty is statistical and the second is systematic. The {{{D}} ^0}-{{hspace{0.0pt}overline{hspace{0.0pt}{D}}} {}^0} production asymmetry is also evaluated and suggests a trend towards negative values at large negative y^{star }. The considered models do not account precisely for all the features observed in the LHCb data, but theoretical predictions including 1% intrinsic charm and 10% recombination contributions better describe the data than the other models considered.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
