Universitätspublikationen
Refine
Year of publication
Document Type
- Article (11135)
- Preprint (1827)
- Doctoral Thesis (1578)
- Working Paper (1445)
- Part of Periodical (571)
- Conference Proceeding (517)
- Report (299)
- Part of a Book (107)
- Review (92)
- Book (60)
Language
- English (17724) (remove)
Has Fulltext
- yes (17724) (remove)
Keywords
- inflammation (95)
- COVID-19 (93)
- SARS-CoV-2 (64)
- Financial Institutions (48)
- climate change (46)
- Germany (45)
- ECB (43)
- aging (43)
- cancer (43)
- apoptosis (42)
Institute
- Medizin (5193)
- Physik (3326)
- Frankfurt Institute for Advanced Studies (FIAS) (1776)
- Wirtschaftswissenschaften (1656)
- Biowissenschaften (1423)
- Informatik (1372)
- Center for Financial Studies (CFS) (1143)
- Sustainable Architecture for Finance in Europe (SAFE) (1071)
- Biochemie und Chemie (861)
- House of Finance (HoF) (706)
Determination of U-spin breaking parameters with an amplitude analysis of the decay D⁰ → K⁰Lπ⁺π⁻
(2022)
We present a study of the resonant structure of the decay D0→K0Lπ+π−, using quantum-correlated D0D¯0 data produced at s√=3.773 GeV. The data sample was collected by the BESIII experiment and corresponds to an integrated luminosity of 2.93 fb−1. This study is the first amplitude analysis of a decay mode involving a K0L, which also results in the first measurement of the complex U-spin breaking parameters (ρ^) related to various CP-eigenstate resonant modes through which the three-body decay proceeds. The moduli of the ρ^ parameters have central values in a wide range from 0.4 to 12.1, which indicates substantial U-spin symmetry breaking. We present the fractional resonant contributions and average strong-phase parameters over regions of phase space for both K0Sπ+π− and K0Lπ+π− modes. We also report the ratio of the branching fractions between K0Lπ+π− and K0Sπ+π− decay modes and the CP-even fraction of the K0Lπ+π− state calculated using the U-spin breaking parameters.
Using 7.33 fb−1 of e+e− collision data collected by the BESIII detector at center-of-mass energies between 4.128 and 4.226~GeV, we observe for the first time the decay D±s→ωπ±η with a statistical significance of 7.6σ. The measured branching fraction of this decay is (0.54±0.12±0.04)%, where the first uncertainty is statistical and the second is systematic.
Using e+e− annihilation data corresponding to an integrated luminosity of 2.93 fb−1 taken at a center-of-mass energy of 3.773 GeV with the BESIII detector, we report the first measurements of the branching fractions of the inclusive decays D0→π+π+π−X and D+→π+π+π−X, where pions from K0S decays have been excluded from the π+π+π− system and X denotes any possible particle combination. The branching fractions of D0(D+)→π+π+π−X are determined to be B(D0→π+π+π−X)=(17.60±0.11±0.22)% and B(D+→π+π+π−X)=(15.25±0.09±0.18)%, where the first uncertainties are statistical and the second systematic.
Measurements of the electric and magnetic form factors of the neutron for timelike momentum transfer
(2023)
We present the first measurements of the electric and magnetic form factors of the neutron in the time-like (positive q2) region as function of four-momentum transfer. We explored the differential cross sections of the reaction e+e−→n¯n with data collected with the BESIII detector at the BEPCII accelerator, corresponding to an integrated luminosity of 354.6 pb−1 in total at twelve center-of-mass energies between s√=2.0−2.95 GeV. A relative uncertainty of 18% and 12% for the electric and magnetic form factors, respectively, is achieved at s√=2.3935 GeV. Our results are comparable in accuracy to those from electron scattering in the comparable space-like (negative q2) region of four-momentum transfer. The electromagnetic form factor ratio Rem≡|GE|/|GM| is within the uncertainties close to unity. We compare our result on |GE| and |GM| to recent model predictions, and the measurements in the space-like region to test the analyticity of electromagnetic form factors.
Using data samples of e+e− collisions collected with the BESIII detector at eight center-of-mass energy points between 3.49 and 3.67 GeV, corresponding to an integrated luminosity of 670 pb−1, we present the upper limits of Born cross sections and the effective form factor for the process e+e−→Ω−Ω¯+. A fit to the cross sections using a pQCD-derived energy dependent function shows no significant threshold effect. The upper limit on the measured effective form factor is consistent with a theoretical prediction within the uncertainty of 1σ. These results provide new experimental information on the production mechanism of Ω.
A determination of the CP-even fraction F+ in the decay D0→K+K−π+π− is presented. Using 2.93 fb−1 of e+e−→ψ(3770)→DD¯ data collected by the BESIII detector, one charm meson is reconstructed in the signal mode and the other in a CP eigenstate or the decay D→K0S,Lπ+π−. Analysis of the relative rates of these double-tagged events yields the result F+=0.730±0.037±0.021, where the first uncertainty is statistical and the second is systematic. This is the first model-independent measurement of F+ in D0→K+K−π+π− decays.
A determination of the CP-even fraction F+ in the decay D0→K+K−π+π− is presented. Using 2.93 fb−1 of e+e−→ψ(3770)→DD¯ data collected by the BESIII detector, one charm meson is reconstructed in the signal mode and the other in a CP eigenstate or the decay D→K0S,Lπ+π−. Analysis of the relative rates of these double-tagged events yields the result F+=0.730±0.037±0.021, where the first uncertainty is statistical and the second is systematic. This is the first model-independent measurement of F+ in D0→K+K−π+π− decays.
A determination of the CP-even fraction F+ in the decay D0→K+K−π+π− is presented. Using 2.93 fb−1 of e+e−→ψ(3770)→DD¯ data collected by the BESIII detector, one charm meson is reconstructed in the signal mode and the other in a CP eigenstate or the decay D→K0S,Lπ+π−. Analysis of the relative rates of these double-tagged events yields the result F+=0.730±0.037±0.021, where the first uncertainty is statistical and the second is systematic. This is the first model-independent measurement of F+ in D0→K+K−π+π− decays.
Biological drug substance (DS) is often frozen to enhance storage stability, prolong shelf life, and increase flexibility during manufacturing. However, the freezing and thawing (F/T) of bulk DS at the manufacturing scale can impact product quality as a result of various critical conditions, including cryo-concentration during freezing, which are influenced, among other things, by product-independent process parameters (e.g., container type, fill level, F/T equipment, and protocols). In this article, we report the optimization of two major methodologies to study product-independent process parameters in DS bottles at the manufacturing scale, namely the recording of temperature profiles and liquid sampling after thawing to quantify the concentration gradients in the solution. We report experimentally justified measuring positions for temperature recordings, especially for the selection of the last point to freeze position, and highlight the implementation of camera-assisted inspection to determine the last point to thaw and the actual thawing time. In particular, we provide, for the first time, a detailed description of the technical implementation of these two measuring set-ups. Based on the reported case studies, we recommend choosing relevant measuring positions as a result of initial equipment characterization, resulting in a resource-conscious study set-up.