Philip Friedel

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We study e+e-→π+π-hc at center-of-mass energies from 3.90 to 4.42 GeV by using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross sections are measured at 13 energies and are found to be of the same order of magnitude as those of e+e-→π+π-J/ψ but with a different line shape. In the π±hc mass(More)
We study the process ee+ e- → π+ π- J/ψ at a center-of-mass energy of 4.260 GeV using a 525  pb(-1) data sample collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross section is measured to be (62.9±1.9±3.7)  pb, consistent with the production of the Y(4260). We observe a structure at around 3.9  GeV/c2 in the(More)
This study was undertaken to evaluate the efficacy and safety of olanzapine compared with fluphenazine in the treatment of patients who met the Diagnostic and Statistical Manual, fourth edition (DSM-IV) diagnostic criteria for schizophrenia or schizoaffective disorder. This was a long-term (22-week), randomized, double-blind, parallel clinical trial. Sixty(More)
We report on a study of the process e+ e- → π± (DD*)∓ at sqrt[s] = 4.26  GeV using a 525 pb(-1) data sample collected with the BESIII detector at the BEPCII storage ring. A distinct charged structure is observed in the (DD*)∓ invariant mass distribution. When fitted to a mass-dependent-width Breit-Wigner line shape, the pole mass and width are determined to(More)
The structure refinement of X-ray powder data using the Rietveld method often results in false minima, i.e. not necessarily the energetically favored result. By introducing force fields as a new type of constraint into the recently developed BGMN program, a fully featured X-ray Rietveld system was created. With the model of bonding and nonbonding(More)
We study the process e+ e- →(D* D*)± π∓ at a center-of-mass energy of 4.26 GeV using a 827  pb(-1) data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a partial reconstruction technique, the Born cross section is measured to be (137±9±15)  pb. We observe a structure near the (D* D*)± threshold in the π∓ recoil(More)
A case of primary spinal echinococcus with bone destruction is presented and the findings in CT and MR imaging are discussed. Although CT and MRI are complementary studies for the diagnosis of the spinal echinococcosis, MRI is the study of choice for prolonged follow-up of complicated cases.
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