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Aad, Georges; Abbott, Brad; Abdallah, Jalal; Abdel Khalek, Samah; Abdinov, Ovsat Bahram oglu; Aben, Rosemarie; Abi, Babak; Abolins, Maris; AbouZeid, Hass; Abramowicz, Halina; Buanes, Trygve; Dale, Ørjan; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Martin dit Latour, Bertrand; Rosendahl, Peter Lundgaard; Sandaker, Heidi; Sjursen, Therese B.; Smestad, Lillian; Stugu, Bjarne; Ugland, Maren; Bugge, Lars; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Czyczula, Zofia; Gjelsten, Børge Kile; Gramstad, Eirik ... view all 51 authors View less authors (2014)
Publisher: American Physical Society
Languages: English
Types: Article
J/psi(3100) pi+, experimental results, Subatomär fysik, mass [excited state], (J/psi(3100) pi+) [mass spectrum], hadronic decay [excited state], hadronic decay [B/c+], :Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431 [VDP], Science & Technology, Fysik, :Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431 [VDP], Settore FIS/01 - Fisica Sperimentale, B/c* --> B/c+ pi+ pi-, excited state, 8000 GeV-cms [7000]--> Subjects: scattering [p p], Subatomic Physics, ATLAS Detector; Meson State, Particle Physics - Experiment, ATLAS, B-C meson; spectroscopy; equation, mass difference, QC, 530, Physical Sciences, Physics and Astronomy (all), High Energy Physics - Experiment, B/c+, Settore FIS/04 - Fisica Nucleare e Subnucleare, CERN LHC Coll, B/c+ --> J/psi(3100) pi+, experimental results, Subatomär fysik, mass [excited state], (J/psi(3100) pi+) [mass spectrum], hadronic decay [excited state], hadronic decay [B/c+], :Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431 [VDP], Science & Technology, Fysik, :Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431 [VDP], Settore FIS/01 - Fisica Sperimentale, B/c* --> B/c+ pi+ pi-, excited state, 8000 GeV-cms [7000]
A search for excited states of the $B^{\pm}_c$ meson is performed using 4.9 fb$^{-1}$ of 7 TeV and 19.2 fb$^{-1}$ of 8 TeV $pp$ collision data collected by the ATLAS experiment at the LHC. A new state is observed through its hadronic transition to the ground state, with the latter detected in the decay $B_c^{\pm} \to J/\psi \pi^{\pm}$. The state appears in the $m(B_c^{\pm}\pi^{+}\pi^{-})-m(B_c^{\pm})-2m(\pi^{\pm})$ mass difference distribution with a significance of 5.2 standard deviations. The mass of the observed state is $6842 \pm 4 \pm 5$~MeV, where the first error is statistical and the second is systematic. The mass and decay of this state are consistent with expectations for the second $S\mbox{-}$wave state of the $B^{\pm}_c$ meson, $B^{\pm}_c(2S)$.

A search for excited states of the Bc± meson is performed using 4.9fb-1 of 7 TeV and 19.2fb-1 of 8 TeV pp collision data collected by the ATLAS experiment at the LHC. A new state is observed through its hadronic transition to the ground state, with the latter detected in the decay Bc±J/ψπ±. The state appears in the m(Bc±π+π-)-m(Bc±)-2m(π±) mass difference distribution with a significance of 5.2 standard deviations. The mass of the observed state is 6842±4±5MeV, where the first error is statistical and the second is systematic. The mass and decay of this state are consistent with expectations for the second S-wave state of the Bc± meson, Bc±(2S).

A search for excited states of the $B^{\pm}_c$ meson is performed using 4.9 fb$^{-1}$ of 7 TeV and 19.2 fb$^{-1}$ of 8 TeV $pp$ collision data collected by the ATLAS experiment at the LHC. A new state is observed through its hadronic transition to the ground state, with the latter detected in the decay $B_c^{\pm} \to J/\psi \pi^{\pm}$. The state appears in the $m(B_c^{\pm}\pi^{+}\pi^{-})-m(B_c^{\pm})-2m(\pi^{\pm})$ mass difference distribution with a significance of 5.2 standard deviations. The mass of the observed state is $6842 \pm 4 \pm 5$ MeV, where the first error is statistical and the second is systematic. The mass and decay of this state are consistent with expectations for the second $S\mbox{-}$wave state of the $B^{\pm}_c$ meson, $B^{\pm}_c(2S)$.

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