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Ajaz, M.; Alfaro Molina, R.; Antonioli, P.; Bala, R.; Bastid, N.; Betev, L.; Bielčík, J.; Bombara, M.; Borissov, A.; Broz, M.; Carena, W.; Cerkala, J.; Chojnacki, M.; Christiansen, P.; Cleymans, J.; Colella, D.; Dahms, T.; Das, S.; Dash, S.; De Caro, A.; Dietel, T.; Espagnon, B.; Eum, J.; Fabris, D.; Feldkamp, L.; Festanti, A.; Filchagin, S.; Foertsch, S.; Fragiacomo, E.; Gago, A.M.; Garabatos, C.; Gianotti, P.; Graham, K.L.; Grion, N.; Hamagaki, H.; Hayashi, S.; Heckel, S.T.; Hetland, K.F.; Hutter, D.; Inaba, M.; Jadlovska, S.; Jahnke, C.; Jang, H.J.; Kileng, B.; Kim, D.J.; Kim, M.; Knichel, M.L.; Kobayashi, T.; Kuijer, P.G.; Kulakov, I.; Kumar, J.; Kushpil, S.; Lenti, V.; Leogrande, E.; Loginov, V.; Lowe, A.; Malaev, M.; Masui, H.; Mercado Pérez, J.; Miake, Y.; Milosevic, J.; Molnar, L.; Montaño Zetina, L.; Morreale, A.; Muccifora, V.; Mukherjee, M.; Nania, R.; Niedziela, J.; Nielsen, B.S.; Pareek, P.; Peskov, V.; Pinsky, L.; Ren, X.; Reolon, A.R.; Rettig, F.; Richert, T.; Romita, R.; Ronflette, L.; Roukoutakis, F.; Ryabinkin, E.; Schiaua, C.; Scioli, G.; Sharma, A.; Simonetti, G.; Singh, R.; Slupecki, M.; Soltz, R.; Song, J.; Sultanov, R.; Takahashi, J.; Telesca, A.; Tsuji, T.; Vilakazi, Z.; Vodopyanov, A.; Voloshin, S.A.; Wilde, M.; Yano, S.; Zaporozhets, S.; Závada, P.; Zgura, I.S.
Physics letters. B, 03/2016, Letnik: 754, Številka: CJournal Article
The production of the hypertriton nuclei HΛ3 and H‾Λ¯3 has been measured for the first time in Pb–Pb collisions at sNN=2.76 TeV with the ALICE experiment at LHC. The pT-integrated HΛ3 yield in one unity of rapidity, dN/dy×B.R.(HΛ3→He3,π−)=(3.86±0.77(stat.)±0.68(syst.))×10−5 in the 0–10% most central collisions, is consistent with the predictions from a statistical thermal model using the same temperature as for the light hadrons. The coalescence parameter B3 shows a dependence on the transverse momentum, similar to the B2 of deuterons and the B3 of 3He nuclei. The ratio of yields S3=HΛ3/(He3×Λ/p) was measured to be S3=0.60±0.13(stat.)±0.21(syst.) in 0–10% centrality events; this value is compared to different theoretical models. The measured S3 is compatible with thermal model predictions. The measured HΛ3 lifetime, τ=181−39+54(stat.)±33(syst.)ps is in agreement within 1σ with the world average value.
