Observation of structure in the J/ψ-pair mass spectrum
| dc.contributor.author | Williams, Michael | |
| dc.date.accessioned | 2022-05-10T19:26:13Z | |
| dc.date.available | 2022-05-10T19:26:13Z | |
| dc.date.issued | 2020-12-15 | |
| dc.identifier.uri | https://hdl.handle.net/1721.1/142456 | |
| dc.description.abstract | Using proton-proton collision data at centre-of-mass energies of √s = 7; 8 and 13 TeV recorded by the ffiffi LHCb experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 9 fb , the invariant mass spectrum of J/w pairs is studied. A narrow structure around 6:9 GeV=c matching the lineshape of a resonance and a broad structure just above twice the J/ψ mass are observed. The deviation of the data from nonresonant J/ψ-pair production is above five standard deviations in the mass region between 6:2 and 7:4 GeV=c , covering predicted masses of states composed of four charm quarks. The mass and natural width of the narrow X(6900) structure are measured assuming a Breit-Wigner lineshape. -1 2 2 | en_US |
| dc.language.iso | en | |
| dc.publisher | Elsevier BV | en_US |
| dc.relation.isversionof | 10.1016/j.scib.2020.08.032 | en_US |
| dc.rights | Creative Commons Attribution 4.0 International License | en_US |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0 | en_US |
| dc.source | Elsevier | en_US |
| dc.title | Observation of structure in the J/ψ-pair mass spectrum | en_US |
| dc.type | Article | en_US |
| dc.identifier.citation | Williams, Michael. 2020. "Observation of structure in the J/ψ-pair mass spectrum." Science Bulletin, 65 (23). | |
| dc.contributor.department | Massachusetts Institute of Technology. Department of Physics | |
| dc.relation.journal | Science Bulletin | en_US |
| dc.eprint.version | Final published version | en_US |
| dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
| eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
| dc.date.updated | 2022-05-10T19:21:48Z | |
| dspace.orderedauthors | Aaij, R; Abellán Beteta, C; Ackernley, T; Adeva, B; Adinolfi, M; Afsharnia, H; Aidala, CA; Aiola, S; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Alfonso Albero, A; Aliouche, Z; Alkhazov, G; Alvarez Cartelle, P; Alves, AA; Amato, S; Amhis, Y; An, L; Anderlini, L; Andreassi, G; Andreianov, A; Andreotti, M; Archilli, F; Artamonov, A; Artuso, M; Arzymatov, K; Aslanides, E; Atzeni, M; Audurier, B; Bachmann, S; Bachmayer, M; Back, JJ; Baker, S; Baladron Rodriguez, P; Balagura, V; Baldini, W; Baptista Leite, J; Barlow, RJ; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Basels, JM; Bassi, G; Batozskaya, V; Batsukh, B; Battig, A; Bay, A; Becker, M; Bedeschi, F; Bediaga, I; Beiter, A; Belavin, V; Belin, S; Bellee, V; Belous, K; Belyaev, I; Bencivenni, G; Ben-Haim, E; Berezhnoy, A; Bernet, R; Berninghoff, D; Bernstein, HC; Bertella, C; Bertholet, E; Bertolin, A; Betancourt, C; Betti, F; Bettler, MO; Bezshyiko, I; Bhasin, S; Bhom, J; Bian, L; Bieker, MS; Bifani, S; Billoir, P; Birch, M; Bishop, FCR; Bizzeti, A; Bjørn, M; Blago, MP; Blake, T; Blanc, F; Blusk, S; Bobulska, D; Bocci, V; Boelhauve, JA; Boente Garcia, O; Boettcher, T; Boldyrev, A; Bondar, A; Bondar, N; Borghi, S; Borisyak, M; Borsato, M; Borsuk, JT; Bouchiba, SA | en_US |
| dspace.date.submission | 2022-05-10T19:21:50Z | |
| mit.journal.volume | 65 | en_US |
| mit.journal.issue | 23 | en_US |
| mit.license | PUBLISHER_CC | |
| mit.metadata.status | Authority Work and Publication Information Needed | en_US |
