S. Platchkov

activity

20242026

collaborators

8 papers

hep-ex2026

First Observation of an Exotic Reggeon

G. D. Alexeev, M. G. Alexeev, C. Alice +180

We present new \compass high-statistics measurements of the peripheral production of $I^\cdot I ¨ ^{-}$ and $I^\cdot^{'} I ¨ ^{-}$ pairs in the reactions $I ¨ ^{-} p \to I^\cdot^{(')} I ¨ ^{-} p$ . For the…

hep-ex2026

Addendum to multiplicities of charged pions, kaons and unidentified charged hadrons on an isoscalar target measured by COMPASS Collaboration

The COMPASS Collaboration

The COMPASS Collaboration has recently published an article "Multiplicities of positive and negative pions, kaons, and unidentified hadrons from deep-inelastic scattering of muons…

hep-ex2025

Dihadron Transverse-Spin Asymmetries in Muon-Deuteron Deep-Inelastic Scattering

G. D. Alexeev, M. G. Alexeev, C. Alice +168

In 2022, the COMPASS collaboration performed semi-inclusive measurements of deep-inelastic muon-scattering on a transversely polarised deuteron (6LiD) target. From these data, tran…

hep-ph2025

Nuclear Cold QCD: Review and Future Strategy

F. Arleo, P. Caucal, A. Deshpande +12

This review examines data from hadron-nucleus collisions, primarily focusing on hard processes like Drell-Yan, heavy flavor and quarkonium production. It highlights observed modifi…

hep-ph2025

Probing Pion Valence Quark Distribution with Beam-charge Asymmetry of Pion-induced $J / I ¨ $ Production

Wen-Chen Chang, Marco Meyer-Conde, Jen-Chieh Peng +2

We consider the beam-charge asymmetry of the $J / I ¨ $ production cross sections in $I ¨ ^{-}$ - versus $I ¨ ^{+}$ -induced reactions on proton or nuclear targets. We show that the $J / I ¨ $ produ…

hep-ex2025

Spectroscopy of Strange Mesons and First Observation of a Strange Crypto-Exotic State with $J^{P} = 0^{-}$

G. D. Alexeev, M. G. Alexeev, C. Alice +160

We measured the strange-meson spectrum in the scattering reaction $K^{-} + p \to K^{-} I ¨ ^{-} I ¨ ^{-} + p$ with the COMPASS spectrometer at CERN. Using the world's largest sample…