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Acharya, S, Adamová, D, Adler, A, Aglieri Rinella, G, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I et al (show 1029 more authors) , Akindinov, A, 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, Altsybeev, I, Anaam, MN, Andrei, C, Andronic, A, Anguelov, V, Antinori, F, Antonioli, P, Apadula, N, Aphecetche, L, Appelshäuser, H, Arata, C, Arcelli, S, Aresti, M, Arnaldi, R, Arneiro, JGMCA, Arsene, IC, Arslandok, M, Augustinus, A, Averbeck, R, Azmi, MD, Badalà, A, Bae, J, Baek, YW, Bai, X, Bailhache, R, Bailung, Y, Balbino, A, Baldisseri, A, Balis, B, Banerjee, D, Banoo, Z, Barbera, R, Barile, F, Barioglio, L, Barlou, M, Barnaföldi, GG, Barnby, LS, 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, Belyaev, V, Bencedi, G, Beole, S, Bercuci, A, Berdnikov, Y, Berdnikova, A, Bergmann, L, Besoiu, MG, Betev, L, Bhaduri, PP, Bhasin, A, Bhat, MA, Bhattacharjee, B, Bianchi, L, Bianchi, N, Bielčík, J, Bielčíková, J, Biernat, J, Bigot, AP, Bilandzic, A, Biro, G, Biswas, S, Bize, N, Blair, JT, Blau, D, Blidaru, MB, Bluhme, N, Blume, C, Boca, G, Bock, F, Bodova, T, Bogdanov, A, Boi, S, Bok, J, Boldizsár, L, Bombara, M, Bond, PM, Bonomi, G, Borel, H, Borissov, A, Borquez Carcamo, AG, Bossi, H, Botta, E, Bouziani, YEM, Bratrud, L, Braun-Munzinger, P, Bregant, M, Broz, M, Bruno, GE, Buckland, MD, Budnikov, D, Buesching, H, Bufalino, S, Buhler, P, Buthelezi, Z, Bylinkin, A, Bysiak, SA, Cai, M, Caines, H, Caliva, A, Calvo Villar, E, Camacho, JMM, Camerini, P, Canedo, FDM, Carabas, M, Carballo, AA, Carnesecchi, F, Caron, R, Carvalho, LAD, Castillo Castellanos, J, Catalano, F, Ceballos Sanchez, C, Chakaberia, I, Chakraborty, P, Chandra, S, Chapeland, S, Chartier, M 
ORCID: 0000-0003-0578-5567, Chattopadhyay, S, Chattopadhyay, S, Chavez, TG, Cheng, T, Cheshkov, C, Cheynis, B, Chibante Barroso, V, Chinellato, DD, Chizzali, ES, Cho, J, Cho, S, Chochula, P, Christakoglou, P, Christensen, CH, Christiansen, P, Chujo, T, Ciacco, M, Cicalo, C, Cindolo, F, Ciupek, MR, Clai, G, Colamaria, F, Colburn, JS, Colella, D, Colocci, M, Conesa Balbastre, G, Conesa del Valle, Z, Contin, G, Contreras, JG, Coquet, ML, Cormier, TM, Cortese, P, Cosentino, MR, Costa, F, Costanza, S, Cot, C, Crkovská, J, Crochet, P, Cruz-Torres, R, Cui, P, Dainese, A, Danisch, MC, Danu, A, Das, P, Das, P, Das, S, Dash, AR, Dash, S, David, RMH, De Caro, A, de Cataldo, G, de Cuveland, J, De Falco, A, De Gruttola, D, De Marco, N, De Martin, C, De Pasquale, S, Deb, R, Deb, S, Debski, RJ, Deja, KR, Del Grande, R, Dello Stritto, L, Deng, W, Dhankher, P, Di Bari, D, Di Mauro, A, Diaz, RA, Dietel, T, Ding, Y, Divià, R, Dixit, DU, Djuvsland, Ø, Dmitrieva, U, Dobrin, A, Dönigus, B, Dubinski, JM, 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(2023)
Measurement of the Λ hyperon lifetime.
Physical Review D, 108 (3).
032009-.
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Abstract
A new, more precise measurement of the Λ hyperon lifetime is performed using a large data sample of Pb-Pb collisions at sNN=5.02 TeV with ALICE. The Λ and Λ¯ hyperons are reconstructed at midrapidity using their two-body weak decay channel Λ→p+π- and Λ¯→p¯+π+. The measured value of the Λ lifetime is τΛ=[261.07±0.37(stat.)±0.72(syst.)] ps. The relative difference between the lifetime of Λ and Λ¯, which represents an important test of CPT invariance in the strangeness sector, is also measured. The obtained value (τΛ-τΛ¯)/τΛ=0.0013±0.0028(stat.)±0.0021(syst.) is consistent with zero within the uncertainties. Both measurements of the Λ hyperon lifetime and of the relative difference between τΛ and τΛ¯ are in agreement with the corresponding world averages of the Particle Data Group and about a factor of three more precise.
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