Publications [#386168] of Seog Oh

Papers Published

1. Acharya, S; Adamová, D; Agarwal, A; Rinella, GA; Aglietta, L; Agnello, M; Agrawal, N; Ahammed, Z; Ahmad, S; Ahn, SU; Ahuja, I; Akindinov, A; Akishina, V; Al-Turany, M; Aleksandrov, D; Alessandro, B; Alfanda, HM; Alfaro Molina, R; Ali, B; Alici, A; Alizadehvandchali, N; Alkin, A; Alme, J; Alocco, G; Alt, T; Altamura, AR; Altsybeev, I; Alvarado, JR; Anaam, MN; Andrei, C; Andreou, N; Andronic, A; Andronov, E; Anguelov, V; Antinori, F; Antonioli, P; Apadula, N; Aphecetche, L; Appelsh, H; Arata, C; Arcelli, S; Aresti, M; Arnaldi, R; Arneiro, JGMCA; Arsene, IC; Arslandok, M; Augustinus, A; Averbeck, R; Azmi, MD; Baba, H; Badal, A; Bae, J; Baek, YW; Bai, X; Bailhache, R; Bailung, Y; Bala, R; Balbino, A; Baldisseri, A; Balis, B; Banerjee, D; Banoo, Z; Barbasova, V; Barile, F; Barioglio, L; Barlou, M; Barman, B; Barnaf, GG; Barnby, LS; Barreau, E; Barret, V; Barreto, L; Bartels, C; Barth, K; Bartsch, E; Bastid, N; Basu, S; Batigne, G; Battistini, D; Batyunya, B; Bauri, D; Bazo Alba, JL; Bearden, IG; Beattie, C; Becht, P; Behera, D; Belikov, I; Bell Hechavarria, ADC; Bellini, F; Bellwied, R; Belokurova, S; Beltran, LGE; Beltran, YAV; Bencedi, G; Bensaoula, A; Beole, S; Berdnikov, Y; Berdnikova, A; Bergmann, L; Besoiu, MG, Exclusive photoproduction of excited ρ mesons decaying to four pions in ultraperipheral Pb–Pb collisions at sNN=5.02 TeV, Physics Letters Section B Nuclear Elementary Particle and High Energy Physics, vol. 872 (January, 2026) [doi]
   (last updated on 2026/01/15)

   Abstract:
   The intense photon fluxes from relativistic nuclei provide an opportunity to study photonuclear interactions in ultraperipheral collisions. In particular, it allows for the investigations of excited, light-flavour vector mesons. The measurement of coherently photoproduced π⁺π⁻π⁺π⁻ final states in ultraperipheral Pb–Pb collisions at sNN=5.02 TeV is presented for the first time. The cross section, d σ /d y , times the branching ratio (ρ→π⁺π⁺π⁻π⁻) is found to be 47.8 ± 2.3 (stat.) ± 7.7 (syst.) mb in the rapidity interval | y | < 0.5. The invariant mass distribution is not well described with a single Breit-Wigner resonance without an interference term. Including interference with a non-resonant contribution results in the mass and width values being too far from those reported in PDG, while the production of two interfering resonances, ρ (1450) and ρ (1700), also provides a good description of the data. The values of the masses ( m ) and widths (Γ) of the resonances extracted from the fit assuming two interfering resonances are m1=1385±14(stat.)±3(syst.) MeV/ c ², Γ1=431±36(stat.)±82(syst.) MeV/ c ², m2=1663±13(stat.)±22(syst.) MeV/ c ² and Γ2=357±31(stat.)±49(syst.) MeV/ c ², respectively. The measured cross sections times the branching ratios are compared to recent theoretical predictions.