Başlık için Makale listeleme
Toplam kayıt 3145, listelenen: 1890-1909
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Observation and spin-parity determination of the x(1835) in j/psi -> gamma(ksks0)-k-0 eta
(2015)We report an observation of the process J/psi -> gamma X(1835) -> gamma(KSKS0)-K-0 eta at low (KSKS0)-K-0 mass with a statistical significance larger than 12.9s using a data sample of 1.31 x 109 J/psi events collected with ... -
Observation and Spin-Parity Determination of theXð1835ÞinJ=ψ→γK0SK0Sη
(2015)We report an observation of the processJ=ψ→γXð1835Þ→γK0SK0Sηat lowK0SK0Smass with astatistical significance larger than12.9σusing a data sample of1.31×109J=ψevents collected with theBESIII detector. In this region of phase ... -
Observation of a charged charmoniumlike structure in e(+)e(-) -> (d* (d)over-bar*)(+/-)pi(-/+) at root s=4.26 gev
(2014)We study the process e(+)e(-) -> (D* (D) over bar*)(+/-)pi(-/+) at a center-of-mass energy of 4.26 GeV using a 827 pb(-1) data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a ... -
Observation of a charged charmoniumlike structure in e+e- → π+π-J/φ at √s=4.26 GeV
(2013)We study the process e+e- → π+π-J/φ at a center-of-mass energy of 4.260 GeV using a 525 pb-1 data sample collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross section is ... -
Observation of a cross-section enhancement near mass threshold in e(+)e(-) -> Lambda(Lambda)over-bar
(2018)The process e(+)e(-) -> Lambda(Lambda) over bar is studied using data samples at root s = 2.2324, 2.400, 2.800 and 3.080 GeV collected with the BESIII detector operating at the BEPCII collider. The Born cross section is ... -
Observation of a neutral charmoniumlike state z(c)(4025)(0) in e(+)e(-) -> (d*(d)over-bar*)(0)pi(0)
(2015)We report a study of the process e(+)e(-) -> (D*(D) over bar*)(0)pi(0) using e(+)e(-) collision data samples with integrated luminosities of 1092 pb(-1) at root s = 4.23 GeV and 826 pb(-1) at root s = 4.26 GeV collected ... -
Observation of a Neutral Charmoniumlike StateZcð4025Þ0ineþe−→ðD ̄D Þ0π
(2015)We report a study of the process e+e-→(D∗D¯∗)0π0 using e+e- collision data samples with integrated luminosities of 1092 pb-1 at s=4.23 GeV and 826 pb-1 at s=4.26 GeV collected with the BESIII detector at the BEPCII storage ... -
Observation of a neutral structure near the d(d)over-bar* mass threshold in e(+)e(-) -> (d(d)over-bar*)(0)pi(0) at root s=4.226 and 4.257 gev
(2015)A neutral structure in the D (D) over bar* system around the D (D) over bar* mass threshold is observed with a statistical significance greater than 10 sigma in the processes e(+)e(-) -> D+D*(-)pi(0) + c.c. and e(+)e(-) ... -
Observation of a Neutral Structure near theD ̄D Mass Threshold ineþe−→ðD ̄D Þ0π0atffiffisp¼4.226 and 4.257 GeV
(2015)A neutral structure in the DD¯∗ system around the DD¯∗ mass threshold is observed with a statistical significance greater than 10σ in the processes e+e-→D+D∗-π0+c.c. and e+e-→D0D¯∗0π0+c.c. at s=4.226 and 4.257 GeV in the ... -
Observation of a new high-spin isomer in Pd94
(2010)A second γ-decaying high-spin isomeric state, with a half-life of 197(22)ns, has been identified in the N=Z+2 nuclide Pd94 as part of a stopped-beam Rare Isotope Spectroscopic INvestigation at GSI (RISING) experiment. ... -
Observation of a(0)(0)(980)-f(0)(980) mixing
(2018)We report the first observation of a(0)(0)(980)-f(0)(980) mixing in the decays of J/psi -> phi f(0)(980) -> phi a(0)(0)(980) -> phi eta pi(0) and chi(c1) -> a(0)(0)(980)pi(0) -> f(0)(980)pi(0)->pi(+)pi(-)pi(0), using data ... -
Observation of a0 0ð980Þ-f 0ð980Þ Mixing
(2018)We report the first observation of a00(980)-f0(980) mixing in the decays of J/ψ→φf0(980)→φa00(980)→φηπ0 and χc1→a00(980)π0→f0(980)π0→π+π-π0, using data samples of 1.31×109 J/ψ events and 4.48×108 ψ(3686) events accumulated ... -
Observation of an anomalous line shape of the eta 'pi(+)pi(-) mass spectrum near the p(p)over-bar mass threshold in j/psi -> gamma eta 'pi(+)pi(-)
(2016)Using 1.09 x 10(9) J/psi events collected by the BESIII experiment in 2012, we study the J / psi -> gamma eta'pi(+)pi(-) process and observe a significant abrupt change in the slope of the eta'pi(+)pi(-) invariant mass ... -
Observation of an anomalous line shape of the eta 'pi(+)pi(-) mass spectrum near the p(p)over-bar mass threshold in j/psi -> gamma eta 'pi(+)pi(-)
(2016)Using 1.09 x 10(9) J/psi events collected by the BESIII experiment in 2012, we study the J / psi -> gamma eta'pi(+)pi(-) process and observe a significant abrupt change in the slope of the eta'pi(+)pi(-) invariant mass ... -
Observation of an Anomalous Line Shape of theη0πþπ−Mass Spectrum near thep ̄pMassThreshold inJ=ψ→γη0πþπ
(2016)Using 1.09×109 J/ψ events collected by the BESIII experiment in 2012, we study the J/ψ→γη′π+π- process and observe a significant abrupt change in the slope of the η′π+π- invariant mass distribution at the proton-antiproton ... -
Observation of an excited b-c(+/-) meson state with the atlas detector
(2015)A search for excited states of the B-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 ... -
Observation of an Excited Bc± Meson State with the ATLAS Detector
(2014-11-21)A search for excited states of the Bc± 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 ... -
Observation of and study of the P-wave Ds mesons
(2019)Studies of e + e - → D s + D(∗) 0 K - and the -wave charmed-strange mesons are performed based on an e + e - collision data sample corresponding to an integrated luminosity of 567 pb -1 collected with the BESIII detector ...