Başlık için Optisyenlik Programı / Opticianry listeleme
Toplam kayıt 110, listelenen: 8-27
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Confirmation of a charged charmoniumlike state Zc (3885)? in e+e- ??± (D D ¯ ?)? with double D tag
(American Physical Society, 2015)We present a study of the process e+e-??±(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 ... -
CVD Yöntemi ile Karbon Katkılanmış Bor Kullanılarak Üretilen MgB2 Süperiletkeninin Yapısal ve Manyetiksel Özelliklerine Sıcaklık Etkisinin İncelenmesi
(Gazi Üniversitesi , Fen Bilimleri Enstitüsü, 2021)Bu çalışmada, MgB2’nin süperiletkenlik özellikleri üzerinde iyileştirici bir rol oynadığı bilinenkarbon, CVD (kimyasal buhar biriktirme) yöntemi ile MgB2’ye katkılanarak sinterlemesıcaklığının değişimine bağlı olarak MgB2’de ... -
CVD Yöntemi ile Karbon Katkılanmış Bor Kullanılarak Üretilen MgB2’nin Mikrosertlik Özelliklerinin İncelenmesi
(Gazi Üniversitesi , Fen Bilimleri Enstitüsü, 2020)Bu çalışmada ülkemiz için stratejik bir öneme sahip olan bor elementi ile elde edilen ve teknolojikaçıdan çok geniş ölçekli bir kullanım alanına sahip olan magnezyum diborür, kimyasal buharbiriktirme (CVD) yöntemi ile elde ... -
Dark photon search in the mass range between 1.5 and 3.4 GeV/c
(Elsevier Science, 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 J/psi events with inclusive J/psi decays
(Chinese Physical, 2017)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 +/- ... -
Determination of the number of psi(3686) events at BESIII
(Science Press, 2018)The numbers of psi(3686) events accumulated by the BESIII detector for the data taken during 2009 and 2012 are determined to be (107.0 +/- 0.8)x10(6) and (341.1 +/- 2.1)x10(6), respectively, by counting inclusive hadronic ... -
Determination of the Spin and Parity of the Z(c)(3900)
(Amer Physic Soc., 2017)The spin and parity of the Z(c)(3900)(+/-) state are determined to be J(P) = 1(+) with a statistical significance larger than 7 sigma over other quantum numbers in a partial wave analysis of the process e(+)e(-) -> pi(+)pi(-) ... -
Evaluation of Superconducting Features and Gap Coefficients for Electron-Phonon Couplings Properties of Mgb2 with Multi-Walled Carbon Nanotube Addition
(Springer, 2022)In this study, the samples are prepared by solid state reaction method at different weight ratios (0-4%). The characterization of materials produced is conducted with the aid of powder X-ray diffraction (XRD), temperatur ... -
Evidence for e(+)e(-) -> gamma eta(c)(1S) at center-of-mass energies between 4.01 and 4.60 GeV
(Amer Physical Soc., 2017)We present first evidence for the process e(+)e(-) -> gamma eta(c)(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross ... -
Evidence for e(+)e(-)->gamma chi c1,2 at center-of-mass energies from 4.009 to 4.360 GeV
(IOP PUBLISHING LTD, 2015)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 the singly Cabibbo suppressed decay Lambda(+)(c) -> p eta and search for Lambda(+)(c) -> p pi(0)
(Amer Physical Soc., 2017)We study the singly Cabibbo suppressed decays Lambda(+)(c) -> p eta and Lambda(+)(c) -> p pi(0) using Lambda(+)(c)(Lambda) over bar (-)(c) pairs produced by e(+)e(-) collisions at a center-of-mass energy of root s = 4.6 ... -
Evidence of Two Resonant Structures in e(+)e(-)->pi(+) pi(-) h(c)
(Amer Physic Soc., 2017)The cross sections of e(+)e(-) -> pi(+) pi(-) hc at center-of-mass energies from 3.896 to 4.600 GeVare measured using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider. The ... -
Hazır MgB2 Tozları ile Mg ve B Tozlarının Karışımı Yolu ile Elde Edilen MgB2 Numunelerinin Kristalografik ve Mikrosertlik Özellikleri Üzerinde Sinterleme Sayısının Etkisi
(Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji, 2022)Bu çalışmada hazır olarak satın alınan MgB2 tozları ile elementel Mg ve B tozlarının karışımı yolu ile elde edilen MgB2 numunelerinin ısıl işlem sayısının kristalografik ve mikrosertlik özellikleri üzerinde nasıl bir değişim ... -
An improved limit for ?ee of X(3872) and ?ee measurement of ?(3686)
(Elsevier, 2015)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-??ISRX(3872)??ISR?+?-J/? via the Initial State Radiation technique. The ... -
Improved measurement of the absolute branching fraction of D+ -> (K)over-bar(0)mu(+)nu(mu)
(Springer, 2016)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 ... -
Improved measurements of branching fractions for eta(c) -> phi phi and omega phi
(Amer Physical Soc., 2017)Using (223.7 +/- 1.4) x 10(6) J / Psi events accumulated with the BESIII detector, we study eta(c) decays to phi phi and omega phi final states. The branching fraction of n(c) -> phi phi is measured to be Br(eta(c) -> phi ... -
Improved measurements of two-photon widths of the chi(cJ) states and helicity analysis for chi(c2) -> gamma gamma
(Amer Physical Soc., 2017)Based on 448.1 x 10(6) Psi(3686) events collected with the BESIII detector, the decays Psi(3686) -> gamma chi(cJ), chi(cJ) -> gamma gamma(J = 0, 1, 2) are studied. The decay branching fractions of chi(c0,2) -> gamma gamma ... -
Investigation of Microhardness Properties of the Multi-Walled Carbon Nanotube Additive Mgb2 Structure By Using The Vickers Method
(Elsevier, 2021)In this study, the effect of multi-walled carbon nanotube doping to MgB2 compound on microhardness properties of MgB2 was investigated by using solid-state reaction method. The amount of multi-walled carbon nanotubes was ... -
Investigation of The Effect of Temperature on The Structural and Magnetic Properties of MgB2 Superconductor Produced Using Boron Doped with Carbon by CVD Method
(Gazi Üniversitesi, 2021)Carbon, which is known to play a improvement role on the superconductivity properties of MgB2, was doped into MgB2 by CVD (chemical vapor deposition) method, and the change of structural and magnetic properties observed ... -
Luminosity measurements for the R scan experiment at BESIII
(Chinese Physical, 2017)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 ...
