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Multiplicity dependence of K*(892) ±  production in pp collisions at s=13 TeV

Abualrob, I.J. ; Basu, S. LU orcid ; Christiansen, P. LU ; Hansen, J. LU orcid ; Iversen, K.E. LU orcid ; Nepeivoda, R. LU orcid ; Ohlson, A. LU ; Panasenko, I. LU ; Silvermyr, D. LU orcid and Staa, J. LU , et al. (2026) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 874.
Abstract
The first results of K*(892) ± production at midrapidity (| y | ' 0.5) in pp collisions at s=13 TeV as a function of the event multiplicity are presented. The K*(892) ± has been reconstructed via its hadronic decay channel K*(892)±→π±+KS0 using the ALICE detector at the LHC. For each multiplicity class, the differential transverse momentum (p T) spectrum, the mean transverse momentum ⟨ p T⟩, the p T-integrated yield (d N /d y), and the ratio of the K*(892) ± to KS0 yields are reported. These are consistent with previous K*(892)0 resonance results with a higher level of precision. Comparisons with phenomenological models such as PYTHIA6, PYTHIA8, EPOS-LHC, and DIPSY are also discussed. For the first time, a significant K*(892) ± /KS0... (More)
The first results of K*(892) ± production at midrapidity (| y | ' 0.5) in pp collisions at s=13 TeV as a function of the event multiplicity are presented. The K*(892) ± has been reconstructed via its hadronic decay channel K*(892)±→π±+KS0 using the ALICE detector at the LHC. For each multiplicity class, the differential transverse momentum (p T) spectrum, the mean transverse momentum ⟨ p T⟩, the p T-integrated yield (d N /d y), and the ratio of the K*(892) ± to KS0 yields are reported. These are consistent with previous K*(892)0 resonance results with a higher level of precision. Comparisons with phenomenological models such as PYTHIA6, PYTHIA8, EPOS-LHC, and DIPSY are also discussed. For the first time, a significant K*(892) ± /KS0 suppression in pp collisions is observed at a 7 σ level passing from low to high multiplicity events. The ratios of the p T-differential yields of K*(892) ± and KS0 in high and low multiplicity events are also presented along with their double ratio. For p T ≲ 2 GeV/ c this double ratio persists below unity by more than 3 σ suggesting that the suppression affects mainly low p T resonances. The measured decreasing trend of the K*(892) ± /KS0 ratio with increasing multiplicity, which in heavy-ion collisions is typically attributed to the rescattering of decay particles of the short-lived resonances, is reproduced by the EPOS-LHC model without the use of hadronic afterburners. © 2026 The Authors. (Less)
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Contribution to journal
publication status
published
subject
keywords
Hadronic resonance production, Multiplicity-dependent resonance production, Resonance suppression, Ultrarelativistic proton-proton collisions
in
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
874
article number
140253
publisher
Elsevier
external identifiers
  • scopus:105031851079
ISSN
0370-2693
DOI
10.1016/j.physletb.2026.140253
language
English
LU publication?
yes
id
d2d4b376-34fa-4d45-a47e-d10ab4162c6d
date added to LUP
2026-04-02 07:54:02
date last changed
2026-04-02 07:55:12
@article{d2d4b376-34fa-4d45-a47e-d10ab4162c6d,
  abstract     = {{The first results of K*(892) ±  production at midrapidity (| y | ' 0.5) in pp collisions at s=13 TeV as a function of the event multiplicity are presented. The K*(892) ±  has been reconstructed via its hadronic decay channel K*(892)±→π±+KS0 using the ALICE detector at the LHC. For each multiplicity class, the differential transverse momentum (p T) spectrum, the mean transverse momentum ⟨ p T⟩, the p T-integrated yield (d N /d y), and the ratio of the K*(892) ±  to KS0 yields are reported. These are consistent with previous K*(892)0 resonance results with a higher level of precision. Comparisons with phenomenological models such as PYTHIA6, PYTHIA8, EPOS-LHC, and DIPSY are also discussed. For the first time, a significant K*(892) ± /KS0 suppression in pp collisions is observed at a 7 σ level passing from low to high multiplicity events. The ratios of the p T-differential yields of K*(892) ±  and KS0 in high and low multiplicity events are also presented along with their double ratio. For p T ≲ 2 GeV/ c this double ratio persists below unity by more than 3 σ suggesting that the suppression affects mainly low p T resonances. The measured decreasing trend of the K*(892) ± /KS0 ratio with increasing multiplicity, which in heavy-ion collisions is typically attributed to the rescattering of decay particles of the short-lived resonances, is reproduced by the EPOS-LHC model without the use of hadronic afterburners. © 2026 The Authors.}},
  author       = {{Abualrob, I.J. and Basu, S. and Christiansen, P. and Hansen, J. and Iversen, K.E. and Nepeivoda, R. and Ohlson, A. and Panasenko, I. and Silvermyr, D. and Staa, J. and Zurlo, N.}},
  issn         = {{0370-2693}},
  keywords     = {{Hadronic resonance production; Multiplicity-dependent resonance production; Resonance suppression; Ultrarelativistic proton-proton collisions}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{Multiplicity dependence of K*(892) ±  production in pp collisions at s=13 TeV}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2026.140253}},
  doi          = {{10.1016/j.physletb.2026.140253}},
  volume       = {{874}},
  year         = {{2026}},
}