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Study of charm \({{\varvec{\Lambda}}}_{{\varvec{c}}}^{+}\) baryon production in pp and p–Pb collisions at \(\sqrt{{{\varvec{s}}}_{\mathbf{NN}}}=5.02\mathbf{TeV}\)

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Abstract

In this paper, we have studied differential production cross section of charmed \({\Lambda }_{\mathrm{c}}^{+}\) baryon as a function of \(p_{T}\) in \({\text{pp}}\) and p–Pb collisions at \(\sqrt {s_{{{\text{NN}}}} } = 5.02 {\text{TeV}}\) in the transverse momentum range of \(1 < p_{T} < 12\;{\text{GeV/c}}\) and \(1<{p}_{T}<24\mathrm{GeV}/c\), respectively. For this study, we compared PYTHIA 8 Monte Carlo simulations with the experimental results obtained by the ALICE Acharya et al. (Phys. Rev. C 104: 054905, 2021) and LHCb Aaij et al. (J. High Energ. Phys. 02: 102, 2019) collaborations. The transverse momentum spectra are plotted in the rapidity interval of \(\left|y\right|<0.5\) for pp collisions, while in \(-0.96<y<0.04 \left(\mathrm{mid}\right)\), \(1.5<y<4\) and \(2.5<y<4\) (forward) and \(-4<y<-2.5\) (backward) rapidity intervals for p–Pb collisions by using PYTHIA 8 Monash tune and CR tunes (modes 0, 2 and 3). Baryon-to-meson ratios \({\Lambda }_{c}^{+}/{D}^{0}\) as a function of \({p}_{T}\) and rapidity are shown. The nuclear modification factor \({R}_{p\mathrm{Pb}}\) for \({\Lambda }_{c}^{+}\) at mid-rapidity calculated from the cross sections in \(pp\) and p–Pb collisions is also presented. Both the magnitude and trend of distributions of \({\Lambda }_{c}^{+}\) and \({\Lambda }_{c}^{+}/{D}^{0}\) ratios verses \({p}_{T}\) as experimentally observed are well explained by PYTHIA 8 tunes that implement color reconnection beyond leading-color approximations.

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Data availability

This manuscript has associated data in a data repository. [Authors’ comment: The ALICE experimental data is taken from https://www.hepdata.net/ from the paper https://doi.org/10.17182/hepdata.114213.]

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Acknowledgements

We would like to acknowledge COMSATS University Islamabad, Islamabad Campus, Pakistan, for providing all possible facilities and a suitable platform to perform the simulations and analysis.

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Authors and Affiliations

  1. Department of Physics, COMSATS University Islamabad, Park Road, Islamabad, 44000, Pakistan

    Y. Ali, H. Zeenat, A. Arif, A. Kainat & U. Tabassam

  2. Department of Physics, Government Gordon College, Rawalpindi, Pakistan

    A. Arif

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  1. Y. Ali
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  2. H. Zeenat
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  4. A. Kainat
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Correspondence to H. Zeenat.

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Ali, Y., Zeenat, H., Arif, A. et al. Study of charm \({{\varvec{\Lambda}}}_{{\varvec{c}}}^{+}\) baryon production in pp and p–Pb collisions at \(\sqrt{{{\varvec{s}}}_{\mathbf{NN}}}=5.02\mathbf{TeV}\). Eur. Phys. J. Plus 137, 209 (2022). https://doi.org/10.1140/epjp/s13360-022-02375-6

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