Optisyenlik Programı Makale Koleksiyonu
https://hdl.handle.net/20.500.12294/396
Optisyenlik Programına ait makaleler bu koleksiyonda listelenir.2019-08-21T11:22:50ZMeasurement of the leptonic decay width of J/psi using initial state radiation
https://hdl.handle.net/20.500.12294/1613
Measurement of the leptonic decay width of J/psi using initial state radiation
Kolcu, Onur Buğra
Using a data set of 2.93 fb(-1) taken at a center-of-mass energy of root s = 3.773 GeV with the BESIII detector at the BEPCII collider, we measure the process e(+) e(-) -> J/psi gamma -> mu(+)mu(-)gamma and determine the product of the branching fraction and the electronic width B-mu mu . Gamma(ee) = (333.4 +/- 2.5(stat) +/- 4.4(sys)) eV. Using the earlier-published BESIII result for B-mu mu = (5.973 +/- 0.007(stat) +/- 0.037(sys))%, we derive the J/psi electronic width Gamma(ee) = (5.58 +/- 0.05(stat) +/- 0.08(sys)) keV.
Kolcu, Onur Buğra (Arel Author)
2016-01-01T00:00:00ZImproved measurement of the absolute branching fraction of D+ -> (K)over-bar(0)mu(+)nu(mu)
https://hdl.handle.net/20.500.12294/1612
Improved measurement of the absolute branching fraction of D+ -> (K)over-bar(0)mu(+)nu(mu)
Kolcu, Onur Buğra
By analyzing 2.93 fb(-1) of data collected at root s = 3.773 GeV with the BESIII detector, we measure the absolute branching fraction B(D+ -> (K) over bar (0) (+)(mu)nu(mu)) = (8.72 +/- 0.07(stat). +/- 0.18(sys).) %, which is consistent with previous measurements within uncertainties but with significantly improved precision. Combining the Particle Data Group values of B(D-0 -> K- mu(+)nu(mu)), B(D+-> (K) over bar (0)e(+)nu(e)), and the lifetimes of the D-0 and D+ mesons with the value of B(D+ -> (K) over bar (0)mu(+)nu(mu)) measured in this work, we determine the following ratios of partial widths: Gamma (D-0 -> (K) over bar (-)mu(+)nu(mu))/Gamma (D+ -> (K) over bar (0)mu+nu(mu)) = 0.963 +/- 0.044 and Gamma (D+ -> (K) over bar (0) mu+nu(mu))/Gamma(D+ -> (K) over bar (0)e+nu(e)) = 0.988 +/- 0.033.
Kolcu, Onur Buğra (Arel Author)
2016-01-01T00:00:00ZDetermination of the number of J/psi events with inclusive J/psi decays
https://hdl.handle.net/20.500.12294/1552
Determination of the number of J/psi events with inclusive J/psi decays
Kolcu, Onur Buğra
A measurement of the number of J/psi events collected with the BESIII detector in 2009 and 2012 is performed using inclusive decays of the J/psi. The number of J/psi events taken in 2009 is recalculated to be (223.7 +/- 1.4) x 10(6), which is in good agreement with the previous measurement, but with significantly improved precision due to improvements in the BESIII software. The number of J/psi events taken in 2012 is determined to be (1086.9 +/- 6.0) x 10(6). In total, the number of J/psi events collected with the BESIII detector is measured to be (1310.6 +/- 7.0) x 10(6), where the uncertainty is dominated by systematic effects and the statistical uncertainty is negligible.
Kolcu, Onur Buğra (Arel Author)
2017-01-01T00:00:00ZLuminosity measurements for the R scan experiment at BESIII
https://hdl.handle.net/20.500.12294/1550
Luminosity measurements for the R scan experiment at BESIII
Kolcu, Onur Buğra
By analyzing the large-angle Bhabha scattering events e(+)e(-) -> (gamma)e(+)e(-) and diphoton events e(+)e(-) -> (gamma)gamma gamma for the data sets collected at center-of-mass (c.m.) energies between 2.2324 and 4.5900 GeV (131 energy points in total) with the upgraded Beijing Spectrometer (BESIII) at the Beijing Electron-Positron Collider (BEPCII), the integrated luminosities have been measured at the different c.m. energies, individually. The results are important inputs for the R value and J/Psi resonance parameter measurements.
Kolcu, Onur Buğra (Arel Author)
2017-01-01T00:00:00Z