The measurement of Sigma(+) production in pp collisions at root s = 13 TeV is presented. The measurement is performed at midrapidity in both minimum-bias and high-multiplicity pp collisions at root s = 13 TeV. The Sigma(+) is reconstructed via its weak-decay topology in the decay channel Sigma(+) -> p + pi(0) with pi(0) -> gamma + gamma. In a novel approach, the neutral pion is reconstructed by combining photons that convert in the detector material with photons measured in the calorimeters. The transverse-momentum (p(T)) distributions of the Sigma(+) and its rapidity densities dN/dy in both event classes are reported. The p(T) spectrum in minimum-bias collisions is compared to QCD-inspired event generators. The ratio of Sigma(+) to previously measured Lambda baryons is in good agreement with calculations from the Statistical Hadronization Model. The high efficiency and purity of the novel reconstruction method for Sigma(+) presented here will enable future studies of the interaction of Sigma(+) with protons in the context of femtoscopic measurements, which could be crucial for understanding the equation of state of neutron stars.

$$\Sigma ^{+}$$ production in pp collisions at $$\sqrt{\textit{s}}=13$$ TeV / Null, N., Abualrob, I.J., Acharya, S., Aglieri Rinella, G., Aglietta, L., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahuja, I., Akbar, Z., Akindinov, A., Akishina, V., Al-Turany, M., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., Ali, B., Alici, A., et al.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 86:2(2026). [10.1140/epjc/s10052-025-15095-9]

$$\Sigma ^{+}$$ production in pp collisions at $$\sqrt{\textit{s}}=13$$ TeV

Bruno, G. E.;Palasciano, A.;Triloki, T.;
2026

Abstract

The measurement of Sigma(+) production in pp collisions at root s = 13 TeV is presented. The measurement is performed at midrapidity in both minimum-bias and high-multiplicity pp collisions at root s = 13 TeV. The Sigma(+) is reconstructed via its weak-decay topology in the decay channel Sigma(+) -> p + pi(0) with pi(0) -> gamma + gamma. In a novel approach, the neutral pion is reconstructed by combining photons that convert in the detector material with photons measured in the calorimeters. The transverse-momentum (p(T)) distributions of the Sigma(+) and its rapidity densities dN/dy in both event classes are reported. The p(T) spectrum in minimum-bias collisions is compared to QCD-inspired event generators. The ratio of Sigma(+) to previously measured Lambda baryons is in good agreement with calculations from the Statistical Hadronization Model. The high efficiency and purity of the novel reconstruction method for Sigma(+) presented here will enable future studies of the interaction of Sigma(+) with protons in the context of femtoscopic measurements, which could be crucial for understanding the equation of state of neutron stars.
2026
$$\Sigma ^{+}$$ production in pp collisions at $$\sqrt{\textit{s}}=13$$ TeV / Null, N., Abualrob, I.J., Acharya, S., Aglieri Rinella, G., Aglietta, L., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahuja, I., Akbar, Z., Akindinov, A., Akishina, V., Al-Turany, M., Aleksandrov, D., Alessandro, B., Alfanda, H.M., Alfaro Molina, R., Ali, B., Alici, A., et al.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 86:2(2026). [10.1140/epjc/s10052-025-15095-9]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/298212
Citazioni
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact