Search for a common baryon source in high-multiplicity pp collisions at the LHC

Acharya, Shreyasi; Adamová, Dagmar; Adler, Alexander; Adolfsson, Jonatan; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Shafiq F.; Alme, Johan; Altenkaemper, Lucas; Djuvsland, Øystein; Eikeland, Viljar Nilsen; Ersdal, Magnus Rentsch; Fionda, Fiorella Maria Celeste; Grøttvik, Ola Slettevoll; Lofnes, Ingrid Mckibben; Nystrand, Joakim; Rehman, Attiq Ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Wagner, Boris; Yang, Shiming; Yuan, Shiming; Zhou, Zhuo; Arsene, Ionut Cristian; Dordic, Olja; Lardeux, Antoine Xavier; Mahmood, Sohail Musa; Malik, Qasim Waheed; Neagu, Alexandra; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Nesbø, Simon Voigt; Storetvedt, Maksim Melnik; Langøy, Rune; Lien, Jørgen; Ahn, Sang Un; Akbar, Zaenai; Akindinov, Alexander; Al-Turany, Mohammed; Alam, Sk Noor; ALICE, Collaboration
Peer reviewed, Journal article
Published version
Thumbnail
View/Open
URI
https://hdl.handle.net/11250/2737601
Date
2020
Metadata
Show full item record
Collections
Original version
Acharya, S., Adamova, D., Adler, A., Adolfsson, J., Aggarwal, M. M., Rinella, G. A., ... & Castellanos, J. C. (2020). Search for a common baryon source in high-multiplicity pp collisions at the LHC. Physics Letters B, 811.   https://doi.org/10.1016/j.physletb.2020.135849
Abstract
We report on the measurement of the size of the particle-emitting source from two-baryon correlations with ALICE in high-multiplicity pp collisions at s√ = 13 TeV. The source radius is studied with low relative momentum p-p, p¯-p¯, p-Λ and p¯-Λ¯ pairs as a function of the pair transverse mass mT considering for the first time in a quantitative way the effect of strong resonance decays. After correcting for this effect, the radii extracted for pairs of different particle species agree. This indicates that protons, antiprotons, Λ, and Λ¯ originate from the same source. Within the measured mT range (1.1-2.2) GeV/c2 the invariant radius of this common source varies between 0.85 and 1.3 fm. These results provide a precise reference for studies of the strong hadron-hadron interactions and for the investigation of collective properties in small colliding systems.
Journal
Physics Letters B
Copyright
© CERN for the benefit of the ALICE collaboration 2020.
Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal