Browsing by Author "Kolcu, O. B."
Now showing items 21-38 of 38
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Measurement of the doubly Cabibbo-suppressed decay D+ -> K+pi(+)pi(-)pi(0) with semileptonic tags
Ablikim, M.; Achasov M.N.; Adlarson P.; Ahmed S.; Albrecht M.; Kolcu, O. B. (American Physical Society, 2021)We propose a new semileptonic tag method to study the doubly Cabibbo-suppressed D decay in ψ(3770)→DD¯ reaction. Utilizing the dataset corresponding to an integrated luminosity of 2.93 fb-1 at a center-of-mass energy of ... -
Measurement of the e(+)e(-) -> Sigma(0)(Sigma)over-bar(0) cross sections at center-of-mass energies from 2.3864 to 3.0200 GeV
Ablikim, M.; Achasov, M. N.; Adlarson, P.; (Ahmed, S.; Albrecht, M.; Amoroso, A.; Kolcu, O. B. (ELSEVIER, 2022)The Born cross sections of e(+)e(-) -> Sigma(0)(Sigma) over bar (0) are measured at center-of-mass energies from 2.3864 to 3.0200 GeV using data samples with an integrated luminosity of 328.5 pb(-1) collected with the ... -
Observation of a Neutral Charmoniumlike State Zc (4025)0 in e+e- → (D∗ D ¯ ∗)0π0
BESIII Collaboration; Kolcu, O. B. (American Physical Society, 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 State X(2600) in the pi(+) pi(-)eta' System in the Process J/psi -> gamma pi(+)pi(-)eta'
Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Kolcu, O. B. (American Physical Society, 2022)Based on (10087±44)×106 J/ψ events collected with the BESIII detector, the process J/ψ→γπ+π-η′ is studied using two largest decay channels of the η′ meson, η′→γπ+π- and η′→ηπ+π-, η→γγ. A new resonance, which we denote as ... -
Observation of D0(+) -> K-S(0)pi(0(+))omega and improved measurement of D-0 -> K- pi(+)omega
BESIII Collaboration; Kolcu, O. B. (AMER PHYSICAL SOC, 2022)By analyzing an e(+)e(-) annihilation data sample with an integrated luminosity of 2.93 fb(-1) taken at the center-of-mass energy of 3.773 GeV with the BESIII detector, we determine the absolute branching fractions of the ... -
Observation of J/Psi Electromagnetic Dalitz Decays to X(1835), X(2120), and X(2370)
Ablikim, M.; Achasov M.N.; Adlarson P.; Ahmed S.; Albrecht M.; Kolcu, O. B. (American Physical Society, 2022)Using a sample of about 1010 J/ψ events collected at a center-of-mass energy s=3.097 GeV with the BESIII detector, the electromagnetic Dalitz decays J/ψ→e+e-π+π-η′, with η′→γπ+π- and η′→π+π-η, have been studied. The decay ... -
Observation of the double Dalitz decay eta' -> e(+)e(-)e(+)e(-)
Ablikim M.; Achasov M.N.; Adlarson P.; Albrecht M.; Aliberti R.; Kolcu, O. B. (Observation of the double Dalitz decay η′ →e+e-e+e-, 2022)Based on (10087±44)×106 J/ψ events collected with the BESIII detector at BEPCII, the double Dalitz decay η′→e+e-e+e-is observed for the first time via the J/ψ→γη′ decay process. The significance is found to be 5.7σ with ... -
Observation of the doubly Cabibbo-suppressed decays D+ -> K+ pi(0)pi(0) and D+ -> K+ pi(0)eta
BESIII Collaboration; Kolcu, O. B. (SPRINGER, 2022)By analyzing e(+)e(-) annihilation data corresponding to an integrated luminosity of 2.93 fb(-1) collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we report the first observations of the doubly ... -
Observation of the Leptonic Decay D+ →τ+ντ
BESIII Collaboration; Kolcu, O. B. (American Physical Society, 2019)We report the first observation of D+→τ+ντ with a significance of 5.1σ. We measure B(D+→τ+ντ)=(1.20±0.24stat±0.12syst)×10-3. Taking the world average B(D+→μ+νμ)=(3.74±0.17)×10-4, we obtain Rτ/μ=Γ(D+→τ+ντ)/Γ(D+→μ+νμ)=3.21 ... -
Search for a massless dark photon in Lambda(+)(c) -> p gamma' decay
BESIII Collaboration; Kolcu, O. B. (AMER PHYSICAL SOC, 2022)The flavor changing neutral current (FCNC) transitionsof the charmed baryonΛþcare of great interest since theycan provide indications for physics beyond the StandardModel (SM). In the framework of the SM, FCNC tran-sitions ... -
Search for a massless dark photon in Λc+ →pγ′ decay
BESIII Collaboration; Kolcu, O. B. (American Physical Society, 2022)A search for a massless dark photon γ′ is conducted using 4.5 fb-1 of e+e- collision data collected at center-of-mass energies between 4.600 and 4.699 GeV with the BESIII detector at BEPCII. No significant signal is observed, ... -
Search for baryon and lepton number violating decays D+ -> (Lambda)over-bar((Sigma)over-bar(0))e(+) and D+ -> Lambda(Sigma(0))e(+)
BESIII Collaboration; Kolcu, O. B. (AMER PHYSICAL SOC, 2020)Using a 2.93 fb(-1) data sample of electron-positron collisions taken with the BESIII detector at a center-of-mass energy of 3.773 GeV, which corresponds to (8296 +/- 31 +/- 64) x 10(3) D+ D- pairs, we search for the baryon ... -
Search for C-parity violation in J/psi -> gamma gamma and gamma phi
BESIII Collaboration; Kolcu, O. B. (AMER PHYSICAL SOC, 2014)Using 1.06 x 10(8) psi(3686) events recorded in e(+)e(-) collisions at root s = 3.686 GeV with the BESIII at the BEPCII collider, we present searches for C-parity violation in J/psi -> gamma gamma and gamma phi decays via ... -
Search for the decay D-s(+) -> p(p)over-bare(+) nu(e)
BESIII Collaboration; Kolcu, O. B. (American Physical Society, 2019)Using a 3.19 fb-1 data sample collected at the s=4.178 GeV with the BESIII detector, we search for the rare decay Ds+→ppe+νe. No significant signal is observed, and an upper limit of B(Ds+→ppe+νe)<2.0×10-4 is set at the ... -
Searches for isospin-violating transitions χc0,2 → π0ηc
BESIII Collaboration; Kolcu, O. B. (American Physical Society, 2015)We present the first upper-limit measurement of the branching fractions of the isospin-violating transitions χc0,2 → π0ηc. The measurements are performed using 106×106ψ(3686) events accumulated with the BESIII detector at ... -
Study of e+e- →π+π-π0ηc and evidence for Zc (3900)± decaying into ρ±ηc STUDY of e+e- →π+π-π0ηc ... M. ABLIKIM et al.
BESIII Collaboration; Kolcu, O. B. (American Physical Society, 2019)We study the reaction e+e-→π+π-π0ηc for the first time using data samples collected with the BESIII detector at center-of-mass energies s=4.226, 4.258, 4.358, 4.416, and 4.600 GeV. Evidence of this process is found and the ... -
Study of the decay D+ -> K*(892)+ K-S(0) in D+ -> (K+KS0)pi(0)
Ablikim M.; Achasov M.N.; Adlarson P.; Ahmed S.; Albrecht M.; Kolcu, O. B. (American Physical Society, 2021)Based on an collision data sample corresponding to an integrated luminosity of collected with the BESIII detector at , the first amplitude analysis of the singly Cabibbo-suppressed decay is performed. From the amplitude ... -
Study of the h(c)(1(1)P(1)) meson via psi(2S) -> pi(0)h(c) decays at BESIII
BESIII Collaboration; Kolcu, O. B. (AMER PHYSICAL SOC, 2022)Using 448 million psi(2S) events, the spin-singlet P-wave charmonium state h(c)(1(1)P(1)) is studied via the psi(2S) -> pi(0)h(c) decay followed by the h(c) -> gamma eta(c) transition. The branching fractions are measured ...
