First Observation of Excited Ω_{b}^{-} States
We report four narrow peaks in the Ξ_{b}^{0}K^{-} mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^{-1} recorded by the LHCb experiment. Referring to these states by their mass, the mass values are m[Ω_...
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| Veröffentlicht in: | Physical review letters 2020-02, Vol.124 (8), p.082002-082002 |
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| creator | Aaij, R Abellán Beteta, C Ackernley, T Adeva, B Adinolfi, M Afsharnia, H Aidala, C A Aiola, S Ajaltouni, Z Akar, S Albicocco, P Albrecht, J Alessio, F Alexander, M Alfonso Albero, A Alkhazov, G Alvarez Cartelle, P Alves, A A Amato, S Amhis, Y An, L Anderlini, L Andreassi, G Andreotti, M Archilli, F Arnau Romeu, J Artamonov, A Artuso, M Arzymatov, K Aslanides, E Atzeni, M Audurier, B Bachmann, S Back, J J Baker, S Balagura, V Baldini, W Baranov, A Barlow, R J Barsuk, S Barter, W Bartolini, M Baryshnikov, F Bassi, G Batozskaya, V Batsukh, B Battig, A Bay, A Becker, M Bedeschi, F Bediaga, I Beiter, A Bel, L J Belavin, V Belin, S Bellee, V Belous, K Belyaev, I Bencivenni, G Ben-Haim, E Benson, S Beranek, S Berezhnoy, A Bernet, R Berninghoff, D Bernstein, H C Bertella, C Bertholet, E Bertolin, A Betancourt, C Betti, F Bettler, M O Bezshyiko, Ia Bhasin, S Bhom, J Bieker, M S Bifani, S Billoir, P Bizzeti, A Bjørn, M Blago, M P Blake, T Blanc, F Blusk, S Bobulska, D Bocci, V Boente Garcia, O Boettcher, T Boldyrev, A Bondar, A Bondar, N Borghi, S Borisyak, M Borsato, M Borsuk, J T Bowcock, T J V Bozzi, C Bradley, M J Braun, S Brea Rodriguez, A |
| description | We report four narrow peaks in the Ξ_{b}^{0}K^{-} mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^{-1} recorded by the LHCb experiment. Referring to these states by their mass, the mass values are m[Ω_{b}(6316)^{-}]=6315.64±0.31±0.07±0.50 MeV, m[Ω_{b}(6330)^{-}]=6330.30±0.28±0.07±0.50 MeV, m[Ω_{b}(6340)^{-}]=6339.71±0.26±0.05±0.50 MeV, m[Ω_{b}(6350)^{-}]=6349.88±0.35±0.05±0.50 MeV, where the uncertainties are statistical, systematic, and the last is due to the knowledge of the Ξ_{b}^{0} mass. The natural widths of the three lower mass states are consistent with zero, and the 90% confidence-level upper limits are determined to be Γ[Ω_{b}(6316)^{-}] |
| doi_str_mv | 10.1103/PhysRevLett.124.082002 |
| format | Article |
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Referring to these states by their mass, the mass values are m[Ω_{b}(6316)^{-}]=6315.64±0.31±0.07±0.50 MeV, m[Ω_{b}(6330)^{-}]=6330.30±0.28±0.07±0.50 MeV, m[Ω_{b}(6340)^{-}]=6339.71±0.26±0.05±0.50 MeV, m[Ω_{b}(6350)^{-}]=6349.88±0.35±0.05±0.50 MeV, where the uncertainties are statistical, systematic, and the last is due to the knowledge of the Ξ_{b}^{0} mass. The natural widths of the three lower mass states are consistent with zero, and the 90% confidence-level upper limits are determined to be Γ[Ω_{b}(6316)^{-}]<2.8 MeV, Γ[Ω_{b}(6330)^{-}]<3.1 MeV and Γ[Ω_{b}(6340)^{-}]<1.5 MeV. The natural width of the Ω_{b}(6350)^{-} peak is 1.4_{-0.8}^{+1.0}±0.1 MeV, which is 2.5σ from zero and corresponds to an upper limit of 2.8 MeV. The peaks have local significances ranging from 3.6σ to 7.2σ. After accounting for the look-elsewhere effect, the significances of the Ω_{b}(6316)^{-} and Ω_{b}(6330)^{-} peaks are reduced to 2.1σ and 2.6σ, respectively, while the two higher mass peaks exceed 5σ. The observed peaks are consistent with expectations for excited Ω_{b}^{-} resonances.</description><identifier>EISSN: 1079-7114</identifier><identifier>DOI: 10.1103/PhysRevLett.124.082002</identifier><identifier>PMID: 32167334</identifier><language>eng</language><publisher>United States</publisher><ispartof>Physical review letters, 2020-02, Vol.124 (8), p.082002-082002</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/32167334$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Aaij, R</creatorcontrib><creatorcontrib>Abellán Beteta, C</creatorcontrib><creatorcontrib>Ackernley, 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F</creatorcontrib><creatorcontrib>Arnau Romeu, J</creatorcontrib><creatorcontrib>Artamonov, A</creatorcontrib><creatorcontrib>Artuso, M</creatorcontrib><creatorcontrib>Arzymatov, K</creatorcontrib><creatorcontrib>Aslanides, E</creatorcontrib><creatorcontrib>Atzeni, M</creatorcontrib><creatorcontrib>Audurier, B</creatorcontrib><creatorcontrib>Bachmann, S</creatorcontrib><creatorcontrib>Back, J J</creatorcontrib><creatorcontrib>Baker, S</creatorcontrib><creatorcontrib>Balagura, V</creatorcontrib><creatorcontrib>Baldini, W</creatorcontrib><creatorcontrib>Baranov, A</creatorcontrib><creatorcontrib>Barlow, R J</creatorcontrib><creatorcontrib>Barsuk, S</creatorcontrib><creatorcontrib>Barter, W</creatorcontrib><creatorcontrib>Bartolini, M</creatorcontrib><creatorcontrib>Baryshnikov, F</creatorcontrib><creatorcontrib>Bassi, G</creatorcontrib><creatorcontrib>Batozskaya, V</creatorcontrib><creatorcontrib>Batsukh, B</creatorcontrib><creatorcontrib>Battig, A</creatorcontrib><creatorcontrib>Bay, A</creatorcontrib><creatorcontrib>Becker, M</creatorcontrib><creatorcontrib>Bedeschi, F</creatorcontrib><creatorcontrib>Bediaga, I</creatorcontrib><creatorcontrib>Beiter, A</creatorcontrib><creatorcontrib>Bel, L J</creatorcontrib><creatorcontrib>Belavin, V</creatorcontrib><creatorcontrib>Belin, S</creatorcontrib><creatorcontrib>Bellee, V</creatorcontrib><creatorcontrib>Belous, K</creatorcontrib><creatorcontrib>Belyaev, I</creatorcontrib><creatorcontrib>Bencivenni, G</creatorcontrib><creatorcontrib>Ben-Haim, E</creatorcontrib><creatorcontrib>Benson, S</creatorcontrib><creatorcontrib>Beranek, S</creatorcontrib><creatorcontrib>Berezhnoy, A</creatorcontrib><creatorcontrib>Bernet, R</creatorcontrib><creatorcontrib>Berninghoff, D</creatorcontrib><creatorcontrib>Bernstein, H C</creatorcontrib><creatorcontrib>Bertella, C</creatorcontrib><creatorcontrib>Bertholet, E</creatorcontrib><creatorcontrib>Bertolin, A</creatorcontrib><creatorcontrib>Betancourt, C</creatorcontrib><creatorcontrib>Betti, F</creatorcontrib><creatorcontrib>Bettler, M O</creatorcontrib><creatorcontrib>Bezshyiko, Ia</creatorcontrib><creatorcontrib>Bhasin, S</creatorcontrib><creatorcontrib>Bhom, J</creatorcontrib><creatorcontrib>Bieker, M S</creatorcontrib><creatorcontrib>Bifani, S</creatorcontrib><creatorcontrib>Billoir, P</creatorcontrib><creatorcontrib>Bizzeti, A</creatorcontrib><creatorcontrib>Bjørn, M</creatorcontrib><creatorcontrib>Blago, M P</creatorcontrib><creatorcontrib>Blake, T</creatorcontrib><creatorcontrib>Blanc, F</creatorcontrib><creatorcontrib>Blusk, S</creatorcontrib><creatorcontrib>Bobulska, D</creatorcontrib><creatorcontrib>Bocci, V</creatorcontrib><creatorcontrib>Boente Garcia, O</creatorcontrib><creatorcontrib>Boettcher, T</creatorcontrib><creatorcontrib>Boldyrev, A</creatorcontrib><creatorcontrib>Bondar, A</creatorcontrib><creatorcontrib>Bondar, N</creatorcontrib><creatorcontrib>Borghi, S</creatorcontrib><creatorcontrib>Borisyak, M</creatorcontrib><creatorcontrib>Borsato, M</creatorcontrib><creatorcontrib>Borsuk, J T</creatorcontrib><creatorcontrib>Bowcock, T J V</creatorcontrib><creatorcontrib>Bozzi, C</creatorcontrib><creatorcontrib>Bradley, M J</creatorcontrib><creatorcontrib>Braun, S</creatorcontrib><creatorcontrib>Brea Rodriguez, A</creatorcontrib><creatorcontrib>LHCb Collaboration</creatorcontrib><title>First Observation of Excited Ω_{b}^{-} States</title><title>Physical review letters</title><addtitle>Phys Rev Lett</addtitle><description>We report four narrow peaks in the Ξ_{b}^{0}K^{-} mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^{-1} recorded by the LHCb experiment. Referring to these states by their mass, the mass values are m[Ω_{b}(6316)^{-}]=6315.64±0.31±0.07±0.50 MeV, m[Ω_{b}(6330)^{-}]=6330.30±0.28±0.07±0.50 MeV, m[Ω_{b}(6340)^{-}]=6339.71±0.26±0.05±0.50 MeV, m[Ω_{b}(6350)^{-}]=6349.88±0.35±0.05±0.50 MeV, where the uncertainties are statistical, systematic, and the last is due to the knowledge of the Ξ_{b}^{0} mass. The natural widths of the three lower mass states are consistent with zero, and the 90% confidence-level upper limits are determined to be Γ[Ω_{b}(6316)^{-}]<2.8 MeV, Γ[Ω_{b}(6330)^{-}]<3.1 MeV and Γ[Ω_{b}(6340)^{-}]<1.5 MeV. The natural width of the Ω_{b}(6350)^{-} peak is 1.4_{-0.8}^{+1.0}±0.1 MeV, which is 2.5σ from zero and corresponds to an upper limit of 2.8 MeV. The peaks have local significances ranging from 3.6σ to 7.2σ. After accounting for the look-elsewhere effect, the significances of the Ω_{b}(6316)^{-} and Ω_{b}(6330)^{-} peaks are reduced to 2.1σ and 2.6σ, respectively, while the two higher mass peaks exceed 5σ. The observed peaks are consistent with expectations for excited Ω_{b}^{-} resonances.</description><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNo1j91KwzAYhoMgbk5vYfTQk9Z8SUyaQxmbCoOJP6eWNPmClXatTTocYxfkzXhNDpxHz8nDw_sSMgWaAVB-_fi-DU-4WWKMGTCR0ZxRyk7IGKjSqQIQI3IewgelFJjMz8iIM5CKczEm2aLqQ0xWZcB-Y2LVrpPWJ_MvW0V0yc93sSv3b7t0nzxHEzFckFNv6oCXR07I62L-MrtPl6u7h9ntMu1AQEyVQaG9l06zG8e0VUJahd4KChaMNp750lKhvDHUWJmD5660Fh23HCXmfEKu_rpd334OGGLRVMFiXZs1tkMoGFeH_VoIcVCnR3UoG3RF11eN6bfF_0f-C43WVZU</recordid><startdate>20200228</startdate><enddate>20200228</enddate><creator>Aaij, R</creator><creator>Abellán Beteta, C</creator><creator>Ackernley, T</creator><creator>Adeva, B</creator><creator>Adinolfi, M</creator><creator>Afsharnia, H</creator><creator>Aidala, C A</creator><creator>Aiola, S</creator><creator>Ajaltouni, Z</creator><creator>Akar, S</creator><creator>Albicocco, 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M ; Alfonso Albero, A ; Alkhazov, G ; Alvarez Cartelle, P ; Alves, A A ; Amato, S ; Amhis, Y ; An, L ; Anderlini, L ; Andreassi, G ; Andreotti, M ; Archilli, F ; Arnau Romeu, J ; Artamonov, A ; Artuso, M ; Arzymatov, K ; Aslanides, E ; Atzeni, M ; Audurier, B ; Bachmann, S ; Back, J J ; Baker, S ; Balagura, V ; Baldini, W ; Baranov, A ; Barlow, R J ; Barsuk, S ; Barter, W ; Bartolini, M ; Baryshnikov, F ; Bassi, G ; Batozskaya, V ; Batsukh, B ; Battig, A ; Bay, A ; Becker, M ; Bedeschi, F ; Bediaga, I ; Beiter, A ; Bel, L J ; Belavin, V ; Belin, S ; Bellee, V ; Belous, K ; Belyaev, I ; Bencivenni, G ; Ben-Haim, E ; Benson, S ; Beranek, S ; Berezhnoy, A ; Bernet, R ; Berninghoff, D ; Bernstein, H C ; Bertella, C ; Bertholet, E ; Bertolin, A ; Betancourt, C ; Betti, F ; Bettler, M O ; Bezshyiko, Ia ; Bhasin, S ; Bhom, J ; Bieker, M S ; Bifani, S ; Billoir, P ; Bizzeti, A ; Bjørn, M ; Blago, M P ; Blake, T ; Blanc, F ; Blusk, S ; Bobulska, D ; Bocci, V ; Boente Garcia, O ; Boettcher, T ; Boldyrev, A ; Bondar, A ; Bondar, N ; Borghi, S ; Borisyak, M ; Borsato, M ; Borsuk, J T ; Bowcock, T J V ; Bozzi, C ; Bradley, M J ; Braun, S ; Brea Rodriguez, A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p141t-7ae49ff6d925d29c746c7efc401c1a9af2fbc047faa0ac681f3dbcced3c3e6e83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Aaij, R</creatorcontrib><creatorcontrib>Abellán Beteta, C</creatorcontrib><creatorcontrib>Ackernley, T</creatorcontrib><creatorcontrib>Adeva, B</creatorcontrib><creatorcontrib>Adinolfi, M</creatorcontrib><creatorcontrib>Afsharnia, H</creatorcontrib><creatorcontrib>Aidala, C A</creatorcontrib><creatorcontrib>Aiola, S</creatorcontrib><creatorcontrib>Ajaltouni, Z</creatorcontrib><creatorcontrib>Akar, S</creatorcontrib><creatorcontrib>Albicocco, P</creatorcontrib><creatorcontrib>Albrecht, J</creatorcontrib><creatorcontrib>Alessio, F</creatorcontrib><creatorcontrib>Alexander, M</creatorcontrib><creatorcontrib>Alfonso Albero, A</creatorcontrib><creatorcontrib>Alkhazov, G</creatorcontrib><creatorcontrib>Alvarez Cartelle, P</creatorcontrib><creatorcontrib>Alves, A A</creatorcontrib><creatorcontrib>Amato, S</creatorcontrib><creatorcontrib>Amhis, Y</creatorcontrib><creatorcontrib>An, L</creatorcontrib><creatorcontrib>Anderlini, L</creatorcontrib><creatorcontrib>Andreassi, G</creatorcontrib><creatorcontrib>Andreotti, M</creatorcontrib><creatorcontrib>Archilli, F</creatorcontrib><creatorcontrib>Arnau Romeu, J</creatorcontrib><creatorcontrib>Artamonov, A</creatorcontrib><creatorcontrib>Artuso, M</creatorcontrib><creatorcontrib>Arzymatov, K</creatorcontrib><creatorcontrib>Aslanides, E</creatorcontrib><creatorcontrib>Atzeni, M</creatorcontrib><creatorcontrib>Audurier, B</creatorcontrib><creatorcontrib>Bachmann, S</creatorcontrib><creatorcontrib>Back, J J</creatorcontrib><creatorcontrib>Baker, S</creatorcontrib><creatorcontrib>Balagura, V</creatorcontrib><creatorcontrib>Baldini, W</creatorcontrib><creatorcontrib>Baranov, A</creatorcontrib><creatorcontrib>Barlow, R J</creatorcontrib><creatorcontrib>Barsuk, S</creatorcontrib><creatorcontrib>Barter, W</creatorcontrib><creatorcontrib>Bartolini, M</creatorcontrib><creatorcontrib>Baryshnikov, F</creatorcontrib><creatorcontrib>Bassi, G</creatorcontrib><creatorcontrib>Batozskaya, V</creatorcontrib><creatorcontrib>Batsukh, B</creatorcontrib><creatorcontrib>Battig, A</creatorcontrib><creatorcontrib>Bay, A</creatorcontrib><creatorcontrib>Becker, M</creatorcontrib><creatorcontrib>Bedeschi, F</creatorcontrib><creatorcontrib>Bediaga, I</creatorcontrib><creatorcontrib>Beiter, A</creatorcontrib><creatorcontrib>Bel, L J</creatorcontrib><creatorcontrib>Belavin, V</creatorcontrib><creatorcontrib>Belin, S</creatorcontrib><creatorcontrib>Bellee, V</creatorcontrib><creatorcontrib>Belous, K</creatorcontrib><creatorcontrib>Belyaev, I</creatorcontrib><creatorcontrib>Bencivenni, G</creatorcontrib><creatorcontrib>Ben-Haim, E</creatorcontrib><creatorcontrib>Benson, S</creatorcontrib><creatorcontrib>Beranek, S</creatorcontrib><creatorcontrib>Berezhnoy, A</creatorcontrib><creatorcontrib>Bernet, R</creatorcontrib><creatorcontrib>Berninghoff, D</creatorcontrib><creatorcontrib>Bernstein, H C</creatorcontrib><creatorcontrib>Bertella, C</creatorcontrib><creatorcontrib>Bertholet, E</creatorcontrib><creatorcontrib>Bertolin, A</creatorcontrib><creatorcontrib>Betancourt, C</creatorcontrib><creatorcontrib>Betti, F</creatorcontrib><creatorcontrib>Bettler, M O</creatorcontrib><creatorcontrib>Bezshyiko, Ia</creatorcontrib><creatorcontrib>Bhasin, S</creatorcontrib><creatorcontrib>Bhom, J</creatorcontrib><creatorcontrib>Bieker, M S</creatorcontrib><creatorcontrib>Bifani, S</creatorcontrib><creatorcontrib>Billoir, P</creatorcontrib><creatorcontrib>Bizzeti, A</creatorcontrib><creatorcontrib>Bjørn, M</creatorcontrib><creatorcontrib>Blago, M P</creatorcontrib><creatorcontrib>Blake, T</creatorcontrib><creatorcontrib>Blanc, F</creatorcontrib><creatorcontrib>Blusk, S</creatorcontrib><creatorcontrib>Bobulska, D</creatorcontrib><creatorcontrib>Bocci, V</creatorcontrib><creatorcontrib>Boente Garcia, O</creatorcontrib><creatorcontrib>Boettcher, T</creatorcontrib><creatorcontrib>Boldyrev, A</creatorcontrib><creatorcontrib>Bondar, A</creatorcontrib><creatorcontrib>Bondar, N</creatorcontrib><creatorcontrib>Borghi, S</creatorcontrib><creatorcontrib>Borisyak, M</creatorcontrib><creatorcontrib>Borsato, M</creatorcontrib><creatorcontrib>Borsuk, J T</creatorcontrib><creatorcontrib>Bowcock, T J V</creatorcontrib><creatorcontrib>Bozzi, C</creatorcontrib><creatorcontrib>Bradley, M J</creatorcontrib><creatorcontrib>Braun, S</creatorcontrib><creatorcontrib>Brea Rodriguez, A</creatorcontrib><creatorcontrib>LHCb Collaboration</creatorcontrib><collection>PubMed</collection><collection>MEDLINE - Academic</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Aaij, R</au><au>Abellán Beteta, C</au><au>Ackernley, T</au><au>Adeva, B</au><au>Adinolfi, M</au><au>Afsharnia, H</au><au>Aidala, C A</au><au>Aiola, S</au><au>Ajaltouni, Z</au><au>Akar, S</au><au>Albicocco, P</au><au>Albrecht, J</au><au>Alessio, F</au><au>Alexander, M</au><au>Alfonso Albero, A</au><au>Alkhazov, G</au><au>Alvarez Cartelle, P</au><au>Alves, A A</au><au>Amato, S</au><au>Amhis, Y</au><au>An, L</au><au>Anderlini, L</au><au>Andreassi, G</au><au>Andreotti, M</au><au>Archilli, F</au><au>Arnau Romeu, J</au><au>Artamonov, A</au><au>Artuso, M</au><au>Arzymatov, K</au><au>Aslanides, E</au><au>Atzeni, M</au><au>Audurier, B</au><au>Bachmann, S</au><au>Back, J J</au><au>Baker, S</au><au>Balagura, V</au><au>Baldini, W</au><au>Baranov, A</au><au>Barlow, R J</au><au>Barsuk, S</au><au>Barter, W</au><au>Bartolini, M</au><au>Baryshnikov, F</au><au>Bassi, G</au><au>Batozskaya, V</au><au>Batsukh, B</au><au>Battig, A</au><au>Bay, A</au><au>Becker, M</au><au>Bedeschi, F</au><au>Bediaga, I</au><au>Beiter, A</au><au>Bel, L J</au><au>Belavin, V</au><au>Belin, S</au><au>Bellee, V</au><au>Belous, K</au><au>Belyaev, I</au><au>Bencivenni, G</au><au>Ben-Haim, E</au><au>Benson, S</au><au>Beranek, S</au><au>Berezhnoy, A</au><au>Bernet, R</au><au>Berninghoff, D</au><au>Bernstein, H C</au><au>Bertella, C</au><au>Bertholet, E</au><au>Bertolin, A</au><au>Betancourt, C</au><au>Betti, F</au><au>Bettler, M O</au><au>Bezshyiko, Ia</au><au>Bhasin, S</au><au>Bhom, J</au><au>Bieker, M S</au><au>Bifani, S</au><au>Billoir, P</au><au>Bizzeti, A</au><au>Bjørn, M</au><au>Blago, M P</au><au>Blake, T</au><au>Blanc, F</au><au>Blusk, S</au><au>Bobulska, D</au><au>Bocci, V</au><au>Boente Garcia, O</au><au>Boettcher, T</au><au>Boldyrev, A</au><au>Bondar, A</au><au>Bondar, N</au><au>Borghi, S</au><au>Borisyak, M</au><au>Borsato, M</au><au>Borsuk, J T</au><au>Bowcock, T J V</au><au>Bozzi, C</au><au>Bradley, M J</au><au>Braun, S</au><au>Brea Rodriguez, A</au><aucorp>LHCb Collaboration</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>First Observation of Excited Ω_{b}^{-} States</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2020-02-28</date><risdate>2020</risdate><volume>124</volume><issue>8</issue><spage>082002</spage><epage>082002</epage><pages>082002-082002</pages><eissn>1079-7114</eissn><abstract>We report four narrow peaks in the Ξ_{b}^{0}K^{-} mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^{-1} recorded by the LHCb experiment. Referring to these states by their mass, the mass values are m[Ω_{b}(6316)^{-}]=6315.64±0.31±0.07±0.50 MeV, m[Ω_{b}(6330)^{-}]=6330.30±0.28±0.07±0.50 MeV, m[Ω_{b}(6340)^{-}]=6339.71±0.26±0.05±0.50 MeV, m[Ω_{b}(6350)^{-}]=6349.88±0.35±0.05±0.50 MeV, where the uncertainties are statistical, systematic, and the last is due to the knowledge of the Ξ_{b}^{0} mass. The natural widths of the three lower mass states are consistent with zero, and the 90% confidence-level upper limits are determined to be Γ[Ω_{b}(6316)^{-}]<2.8 MeV, Γ[Ω_{b}(6330)^{-}]<3.1 MeV and Γ[Ω_{b}(6340)^{-}]<1.5 MeV. The natural width of the Ω_{b}(6350)^{-} peak is 1.4_{-0.8}^{+1.0}±0.1 MeV, which is 2.5σ from zero and corresponds to an upper limit of 2.8 MeV. The peaks have local significances ranging from 3.6σ to 7.2σ. After accounting for the look-elsewhere effect, the significances of the Ω_{b}(6316)^{-} and Ω_{b}(6330)^{-} peaks are reduced to 2.1σ and 2.6σ, respectively, while the two higher mass peaks exceed 5σ. The observed peaks are consistent with expectations for excited Ω_{b}^{-} resonances.</abstract><cop>United States</cop><pmid>32167334</pmid><doi>10.1103/PhysRevLett.124.082002</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | EISSN: 1079-7114 |
| ispartof | Physical review letters, 2020-02, Vol.124 (8), p.082002-082002 |
| issn | 1079-7114 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_2377339444 |
| source | American Physical Society Journals; EZB-FREE-00999 freely available EZB journals |
| title | First Observation of Excited Ω_{b}^{-} States |
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