Başlık için Meslek Yüksekokulları listeleme
Toplam kayıt 243, listelenen: 140-159
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Observation and spin-parity determination of the X(1835) in J/? ? ?K0SK0S?
(American Physical Society, 2015)We report an observation of the process J/? ? ?X(1835) ? ?K0SK0S? at low K0SK0S mass with a statistical significance larger than 12.9? using a data sample of 1.31 × 109 J/? events collected with the BESIII detector. In ... -
Observation of a cross-section enhancement near mass threshold in e(+)e(-) -> Lambda(Lambda)over-bar
(Amer Physical Soc., 2019)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 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
(Amer Physical Soc., 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 chi(c2) -> eta 'eta ' and chi(c0,2) -> eta eta '
(Amer Physical Soc., 2017)Using a sample of 448.1 x 10(6) Psi(3686) events collected with the BESIII detector in 2009 and 2012, we study the decays chi(c0,2) -> eta 'eta ' and eta eta '. The decays chi(c2) -> eta 'eta ', chi(c0) -> eta eta ' and ... -
Observation of e +e - › ? 0? 0hc and a neutral charmoniumlike structure Zc(4020)0
(2014)Using data collected with the BESIII detector operating at the Beijing Electron Positron Collider at center-of-mass energies of s?=4.23, 4.26, and 4.36 GeV, we observe e+e-›?0?0hc for the first time. The Born cross sections ... -
Observation of e(+)e(-) -> eta h(c) at center-of-mass energies from 4.085 to 4.600 GeV
(Amer Physical Soc., 2017)We observe for the first time the process e(+) e(-) -> eta h(c) with data collected by the BESIII experiment. Significant signals are observed at the center-of-mass energy root s = 4.226 GeV, and the Born cross section is ... -
Observation of e(+)e(-) -> omega chi(c1,2) near root s=4.42 and 4.6 GeV
(2016)BEPC-BES. Based on data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies s?>s> 4.4 GeV, the processes e+e-›??c1,2e+e-›??c1,2 are observed for the first time. With ... -
Observation of e(+)e(-) -> phi chi(c1) and phi chi(c2) at root s=4.600 GeV
(Amer Physical Soc., 2018)Using a data sample collected with the BESIII detector operating at the BEPCII storage ring at a center-of-mass energy of root s = 4.600 GeV, we search for the production of e(+)e(-) -> phi chi(c0,1,2). A search is also ... -
Observation of e+e- ? ?+?- hc and a Neutral Charmoniumlike Structure Zc(4020)0
(American Physical Society, 2014)Using data collected with the BESIII detector operating at the Beijing Electron Positron Collider at center-of-mass energies of ?s = 4.23, 4.26, and 4.36 GeV, we observe e+e- ? ?+?-hc for the first time. The Born cross ... -
Observation of eta ' -> omega e(+)e(-)
(American Physical Society, 2015)Based on a sample of ?? mesons produced in the radiative decay J/????? in 1.31×109 J/? events collected with the BESIII detector, the decay ????e+e- is observed for the first time, with a statistical significance of 8?. ... -
Observation of hc radiative decay hc › ??' and evidence for hc › ??
(2016)A search for radiative decays of the P-wave spin singlet charmonium resonance hc is performed based on 4.48 × 108 ? events collected with the BESIII detector operating at the BEPCII storage ring. Events of the reaction ... -
Observation of Lambda(+)(c) -> nK(S)(0)pi(+)
(Amer Physic Soc., 2017)We report the first direct measurement of decays of the Lambda(+)(c) baryon involving the neutron. The analysis is performed using 567 pb(-1) of e(+)e(-) collision data collected at root s = 4.599 GeV with the BESIII ... -
Observation of pseudoscalar and tensor resonances in J/psi -> gamma phi phi
(American Physical Society, 2016)Based on a sample of (1310.6±10.5)×106 J/? events collected with the BESIII detector operating at the BEPCII storage ring, a partial wave analysis of the decay J/????? is performed in order to study the intermediate states. ... -
Observation of psi(3686) -> e(+)e(-)chi(cJ) and chi(cJ) -> e(+)e(-)J/psi
(Amer Physic Soc., 2017)Using 4.479 x 10(8) psi(3686) events collected with the BESIII detector, we search for the decays psi(3686) -> e(+)e(-)chi(cJ) and chi(cJ) -> e(+)e(-)J/psi, where J = 0, 1, 2. The decays psi(3686) -> e(+)e(-)chi(cJ) and ... -
Observation of the dalitz decay ?’??e+e?
(American Physical Society, 2015)We report the first observation of the Dalitz decay ?’??e+e?, based on a data sample of 1.31 billion J/? events collected with the BESIII detector. The ?’ mesons are produced via the J/????’ decay process. The ratio ... -
Observation of the decay Lambda(+)(c) -> Sigma(-)pi(+)pi(+)pi(0)
(Elsevier Science, 2017)We report the first observation of the decay Lambda(+)(c) -> Sigma(-)pi(+)pi(+)pi(0), based on data obtained in e(+)e(-) annihilations with an integrated luminosity of 567 pb(-1) at vs = 4.6 GeV. The data were collected ... -
Observation of the doubly radiative decay eta ' -> gamma gamma pi(0)
(Amer Physical Soc., 2017)Based on a sample of 1.31 billion J/psi events collected with the BESIII detector, we report the study of the doubly radiative decay eta' -> gamma gamma pi(0) for the first time, where the eta' meson is produced via the ... -
Observation of the electromagnetic doubly OZI-suppressed decay J /? ???0
(American Physical Society, 2015)Using a sample of 1.31 billion J/? events accumulated with the BESIII detector at the BEPCII collider, we report the observation of the decay J/????0, which is the first evidence for a doubly Okubo-Zweig-Iizuka suppressed ...
