Browsing by Author "BESIII Collaboration"
Now showing items 1-20 of 87
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Amplitude analysis of the d+ -> k-s(0)pi + (0)(pi) dalitz plot
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2014-03-11)We perform an analysis of the D+ -> K-S(0)pi + (0)(pi) Dalitz plot using a data set of 2.92 fb(-1) of e(+) e(-) collisions at the (3770) mass accumulated by the BESIII experiment, in which 166694 candidate events are ... -
Confirmation of a charged charmoniumlike state Zc (3885)∓ in e+e- →π± (D D ¯ ∗)∓ with double D tag
BESIII Collaboration; Çetin, Serkant Ali (American Physical Society, 2015-11-09)We present a study of the process e+e-→π±(DD¯∗)∓ using data samples 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 ring. With full reconstruction of the D ... -
Dark photon search in the mass range between 1.5 and 3.4 GeV/c
Çetin, Serkant Ali; BESIII Collaboration (Elsevier, 2017)Using a data set of 2.93 fb taken at a center-of-mass energy root s = 3.773 GeV with the BESIII detector at the BEPCII collider, we perform a search for an extra U(1) gauge boson, also denoted as a dark photon. We examine ... -
Determination of the number of psi ' events at BESIII
Çetin, Serkant Ali; BESIII Collaboration (Chinese Physical Society, 2013-06)The number of psi' events accumulated by the BESIII experiment from March 3 through April 14, 2009, is determined by counting inclusive hadronic events. The result is 106.41x(1.00+/-0.81%)x10(6). The error is systematic ... -
Evidence for e(+)e(-)->gamma chi c1,2 at center-of-mass energies from 4.009 to 4.360 Gev
Çetin, Serkant Ali; BESIII Collaboration (Chinese Physical Society, 2015-04)Using data samples collected at center-of-mass energies of root s=4.009, 4.230, 4.260, and 4.360 GeV with the BESIII detector operating at the BEPCII collider, we perform a search for the process e(+)e(-)->gamma chi(cJ) ... -
Evidence for eta(c) -> gamma gamma and measurement of J/psi -> 3 gamma
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2013-02-08)The decay of J/psi to three photons is studied using psi (3686) -> pi(+) pi(-) J/psi in a sample of 1.0641 X 10(8) psi (3686) events collected with the BESIII detector. Evidence of the direct decay of eta(c) to two photons, ... -
Evidence for eta(c)(2S) in psi(3686) -> gamma(KSK +/-)-K-0 pi(-/+)pi(+)pi(-)
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2013-03-04)We search for the M1 radiative transition psi(3686) -> gamma eta(c)(2S) by reconstructing the exclusive eta(c)(2S) -> (KSK +/-)-K-0 pi(-/+)pi(+)pi(-) decay using 1.06 X 10(8) psi(3686) events collected with the BESIII ... -
Experimental study of psi ' decays to K+K- pi(0) and K+K-eta
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2012-10-26)Using (106 +/- 4) x 10(6) psi ' events accumulated with the BESIII detector at the BEPCII e(+)e(-) collider, we present measurements of the branching fractions for psi' decays to K+K- pi(0) and K+K- eta. In these final ... -
First observation of the isospin violating decay j/psi -> lambda(sigma)over-bar(0) + c.c.
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2012-08-15)Using a sample of (225.2 +/- 2.8) x 10(6) J/psi events collected with the BESIII detector, we present results of a study of J/psi -> gamma Lambda(Lambda) over bar and report the first observation of the isospin violating ... -
An improved limit for Γee of X(3872) and Γee measurement of ψ(3686)
Çetin, Serkant Ali; BESIII Collaboration (Elsevier, 2015-10-07)Using the data sets taken at center-of-mass energies above 4 GeV by the BESIII detector at the BEPCII storage ring, we search for the reaction e+e-→γISRX(3872)→γISRπ+π-J/ψ via the Initial State Radiation technique. The ... -
Measurement of azimuthal asymmetries in inclusive charged dipion production in e(+) e(-) annihilations at root s=3.65 GeV
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2016-01-27)We present a measurement of the azimuthal asymmetries of two charged pions in the inclusive process e(+) e(-) -> pi pi X based on a data set of 62 pb(-1) at the center-of-mass energy of 3.65 GeV collected with the SESIII ... -
Measurement of b(psi(3770) -> gamma chi(c1)) and search for psi(3770) -> gamma chi(c2)
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2015-05-26)We report a measurement of the branching fraction for psi(3770) -> gamma chi(c1) and search for the transition psi(3770) -> gamma chi(c2) based on 2.92 fb(-1) of e(+)e(-) data accumulated at root s = 3.773 GeV with the ... -
Measurement of chi(cj) decaying into eta ' k+k-
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2014-04-11)Using (106.41 +/- 0.86) x 10(6) Psi(3686) events collected with the BESIII detector at BEPCII, we study for the first time the decay chi(cJ) -> eta'K+K- (J = 1, 2), where eta' -> gamma rho(0) and eta' -> eta pi(+)pi(-). A ... -
Measurement of chi(cj) decaying into p(n)over-bar pi(-) and p(n)over-bar pi(-)pi(0)
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2012-09-26)Using a data sample of 1.06 x 10(8) psi' events collected with the BESIII detector in 2009, the branching fractions of chi(cJ) -> p (n) over bar pi(-) and chi(cJ) -> p (n) over bar pi(-)pi(0) (J = 0, 1, 2) are measured. ... -
Measurement of eta ' -> pi(+)pi(-)e(+)e(-) and eta ' -> pi(+)pi(-)mu(+)mu(-)
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2013-05-28)Based on a sample of 225.3 million J/psi events accumulated with the BESIII detector at the BEPCII, the decays of eta' -> pi(+)pi(-) l(+)l(-) are studied via J/psi -> gamma eta'. A clear eta' signal is observed in the ... -
Measurement of the branching fraction for psi(3686) -> omega k+k-
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2014-06-24)With 1.06 x 10(8) psi(3686) events collected with the BESIII detector, the branching fraction of psi(3686) -> omega K+K- is measured to be (1.54 +/- 0.04 +/- 0.11) x 10(-4). This is the most precise result to date, due to ... -
Measurement of the branching fractions of Ds+→η'X and Ds+→η'ρ+ in e+e-→Ds+Ds-
BESIII Collaboration; Çetin, Serkant Ali (Elsevier, 2015-11-12)We study Ds+ decays to final states involving the η' with a 482 pb-1 data sample collected at s=4.009 GeV with the BESIII detector at the BEPCII collider. We measure the branching fractions B(Ds+→η'X)=(8.8±1.8±0.5)% and ... -
Measurement of the D →k−π+ strong phase difference in ψ(3770) →D0D̅0
Çetin, Serkant Ali; BESIII Collaboration (Elsevier, 2014-06)We study D0D̅0 pairs produced in e+e− collisions at √ s = 3.773 GeVusing a data sample of 2.92 fb−1 collected with the BESIII detector. We measuredthe asymmetry ACPKπ of the branching fractions of D → K−π+ in CP-odd and ... -
Measurement of the e(+)e(-) -> eta j/psi cross section and search for e(+)e(-) -> pi(0)j/psi at center-of-mass energies between 3.810 and 4.600 GeV
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2015-06-09)Using data samples collected with the BESIII detector operating at the BEPCII collider at 17 center-of-mass energies from 3.810 to 4.600 GeV, we perform a study of e(+)e(-) -> eta J/psi and pi(0)J/psi The Born cross sections ... -
Measurement of the form factors in the decay D+ →ωe+νe and search for the decay D+ →φe+νe
Çetin, Serkant Ali; BESIII Collaboration (American Physical Society, 2015-10-19)Using 2.92fb-1 of electron-positron annihilation data collected at a center-of-mass energy of s=3.773GeV with the BESIII detector, we present an improved measurement of the branching fraction B(D+→ωe+νe)=(1.63±0.11±0.08)×10-3. ...
