B. Krusche
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View article: First Measurement Using Elliptically Polarized Photons of the Double-Polarization Observable <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>E</mml:mi></mml:math> for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>γ</mml:mi><mml:mi>p</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>p</mml:mi><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>γ</mml:mi><mml:mi>p</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>n</mml:mi><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>
First Measurement Using Elliptically Polarized Photons of the Double-Polarization Observable for and Open
We report the measurement of the helicity asymmetry E for the pπ0 and nπ+ final states using, for the first time, an elliptically polarized photon beam in combination with a longitudinally polarized target at the Crystal Ball experiment at…
View article: First measurement using elliptically polarized photons of the double-polarization observable $E$ for $γp \to p π^0$ and $γp \to n π^+$
First measurement using elliptically polarized photons of the double-polarization observable $E$ for $γp \to p π^0$ and $γp \to n π^+$ Open
We report the measurement of the helicity asymmetry $E$ for the $pπ^0$ and $nπ^+$ final states using, for the first time, an elliptically polarized photon beam in combination with a longitudinally polarized target at the Crystal Ball exper…
Neutron polarisation transfer, , in π+ photoproduction off the proton, Open
View article: Helicity dependent cross sections for the photoproduction of π0π± pairs from quasi-free nucleons
Helicity dependent cross sections for the photoproduction of π0π± pairs from quasi-free nucleons Open
Photoproduction of π0π±
\n-pairs from quasifree nucleons bound in the deuteron has been investigated to study the helicity dependence of this reaction. Measurements with a liquid deuterium target were used to extract the unpolarized cross …
View article: Measurement of polarization observables $$\textbf{T}$$, $${\textbf{P}}$$, and $${\textbf{H}}$$ in $$\mathbf {\pi ^0}$$ and $$\mathbf {\eta }$$ photoproduction off quasi-free nucleons
Measurement of polarization observables $$\textbf{T}$$, $${\textbf{P}}$$, and $${\textbf{H}}$$ in $$\mathbf {\pi ^0}$$ and $$\mathbf {\eta }$$ photoproduction off quasi-free nucleons Open
View article: Helicity dependent cross sections for the photoproduction of $π^0π^{\pm}$ pairs from quasi-free nucleons
Helicity dependent cross sections for the photoproduction of $π^0π^{\pm}$ pairs from quasi-free nucleons Open
Photoproduction of $π^0π^{\pm}$-pairs from quasifree nucleons bound in the deuteron has been investigated to study the helicity dependence of this reaction. Measurements with a liquid deuterium target were used to extract the unpolarized c…
View article: First measurement of polarisation transfer <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msubsup><mml:mrow><mml:mi>C</mml:mi></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>x</mml:mi></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:mi>n</mml:mi></mml:mrow></mml:msubsup></mml:math> in deuteron photodisintegration
First measurement of polarisation transfer in deuteron photodisintegration Open
View article: Technical design report for the endcap disc DIRC <sup>*</sup>
Technical design report for the endcap disc DIRC <sup>*</sup> Open
PANDA (anti-proton annihiliation at Darmstadt) is planned to be one of the four main experiments at the future international accelerator complex FAIR (Facility for Antiproton and Ion Research) in Darmstadt, Germany. It is going to address …
View article: Review of Particle Physics
Review of Particle Physics Open
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Hi…
View article: Characterization of muon and electron beams in the Paul Scherrer Institute PiM1 channel for the MUSE experiment
Characterization of muon and electron beams in the Paul Scherrer Institute PiM1 channel for the MUSE experiment Open
The MUon Scattering Experiment, MUSE, at the Paul Scherrer Institute, Switzerland, investigates the proton charge radius puzzle, lepton universality, and two-photon exchange, via simultaneous measurements of elastic muon-proton and electro…
View article: Measurement of Compton Scattering at MAMI for the Extraction of the Electric and Magnetic Polarizabilities of the Proton
Measurement of Compton Scattering at MAMI for the Extraction of the Electric and Magnetic Polarizabilities of the Proton Open
A precise measurement of the differential cross sections dσ/dΩ and the linearly polarized photon beam asymmetry Σ_{3} for Compton scattering on the proton below pion threshold has been performed with a tagged photon beam and almost 4π dete…
View article: Observation of a structure in the $$M_{p\eta }$$ invariant mass distribution near 1700 $$\hbox {MeV}/\hbox {c}^2$$ in the $$\gamma \mathbf {p \rightarrow p \pi ^0 \eta } $$ reaction
Observation of a structure in the $$M_{p\eta }$$ invariant mass distribution near 1700 $$\hbox {MeV}/\hbox {c}^2$$ in the $$\gamma \mathbf {p \rightarrow p \pi ^0 \eta } $$ reaction Open
View article: Experimental study of the gamma function rightwards arrow kappa[superscript0]n-ary summation[superscript+], gamma function rightwards arrow kappa[superscript0]logical, and gamma function rightwards arrow kappa[superscript0] n-ary summation[superscript0] reactions at the Mainz Microtron
Experimental study of the gamma function rightwards arrow kappa[superscript0]n-ary summation[superscript+], gamma function rightwards arrow kappa[superscript0]logical, and gamma function rightwards arrow kappa[superscript0] n-ary summation[superscript0] reactions at the Mainz Microtron Open
This work measured d σ/ d Ω for neutral kaon photoproduction reactions from threshold up to a c.m. energy of 1855MeV, focussing specifically on the γp→ KΣ+, γn→ KΛ, and γn→ KΣ reactions. Our results for γn→ KΣ are the first-ever measuremen…
View article: Observation of a structure in the M$_{p\eta}$ invariant mass distribution near 1700 MeV in the $\mathbf{\gamma p \rightarrow p \pi^0 \eta} $ reaction
Observation of a structure in the M$_{p\eta}$ invariant mass distribution near 1700 MeV in the $\mathbf{\gamma p \rightarrow p \pi^0 \eta} $ reaction Open
The reaction $\gamma p \rightarrow p \pi^0 \eta$ has been studied with the
CBELSA/TAPS detector at the electron stretcher accelerator ELSA in Bonn for
incident photon energies from threshold up to 3.1 GeV. This paper has been
motivated by …
View article: Single $$\pi ^0$$ production off neutrons bound in deuteron with linearly polarized photons
Single $$\pi ^0$$ production off neutrons bound in deuteron with linearly polarized photons Open
View article: Study of excited $$\varvec{\varXi }$$ baryons with the $$\overline{\text{ P }}$$ANDA detector
Study of excited $$\varvec{\varXi }$$ baryons with the $$\overline{\text{ P }}$$ANDA detector Open
The study of baryon excitation spectra provides insight into the inner structure of baryons. So far, most of the world-wide efforts have been directed towards $$N^*$$ and $$\varDelta $$ spectroscopy. Nevertheless, the study of the do…
View article: The potential of $$\varLambda $$ and $$\varXi ^-$$ studies with PANDA at FAIR
The potential of $$\varLambda $$ and $$\varXi ^-$$ studies with PANDA at FAIR Open
View article: Measurement of the helicity asymmetry E for the reaction $$ \gamma p\rightarrow \pi ^0 p$$
Measurement of the helicity asymmetry E for the reaction $$ \gamma p\rightarrow \pi ^0 p$$ Open
View article: Feasibility studies for the measurement of time-like proton electromagnetic form factors from $$\bar{p}p \rightarrow \mu ^+\mu ^-$$ at $$\overline{\text {P}}\text {ANDA}$$ at FAIR
Feasibility studies for the measurement of time-like proton electromagnetic form factors from $$\bar{p}p \rightarrow \mu ^+\mu ^-$$ at $$\overline{\text {P}}\text {ANDA}$$ at FAIR Open
View article: Timing detectors with SiPM read-out for the MUSE experiment at PSI
Timing detectors with SiPM read-out for the MUSE experiment at PSI Open
View article: Observation of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math> Cusp in the New Precise Beam Asymmetry <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Σ</mml:mi></mml:math> Data for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi><mml:mi>p</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>p</mml:mi><mml:mi>η</mml:mi></mml:math>
Observation of the Cusp in the New Precise Beam Asymmetry Data for Open
Data on the beam asymmetry Σ in the photoproduction of η mesons off protons are reported for tagged photon energies from 1130 to 1790 MeV (mass range from W=1748 MeV to W=2045 MeV). The data cover the full solid angle that allows for a pre…
View article: Extracting the spin polarizabilities of the proton by measurement of Compton double-polarization observables
Extracting the spin polarizabilities of the proton by measurement of Compton double-polarization observables Open
The Compton double-polarization observable Σ2z has been measured for the first time in the Δ(1232) resonance region using a circularly polarized photon beam incident on a longitudinally polarized proton target at the Mainz Microtron. This …
View article: Helicity-Dependent Cross Sections for the Photoproduction of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math> Pairs from Nucleons
Helicity-Dependent Cross Sections for the Photoproduction of Pairs from Nucleons Open
The double-polarization observable E and helicity-dependent cross sections σ_{1/2}, σ_{3/2} have been measured for the photoproduction of π^{0} pairs off quasifree protons and neutrons at the Mainz MAMI accelerator with the Crystal Ball/TA…
View article: The BGOOD experimental setup at ELSA
The BGOOD experimental setup at ELSA Open
View article: Signatures of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>d</mml:mi></mml:mrow><mml:mrow><mml:mo>*</mml:mo></mml:mrow></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:mn>2380</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math> Hexaquark in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>d</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mi>γ</mml:mi><mml:mo>,</mml:mo><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mrow><mml:mi>n</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">→</mml:mo></mml:mrow></mml:mover><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:math>
Signatures of the Hexaquark in Open
We report a measurement of the spin polarization of the recoiling neutron in deuterium photodisintegration, utilizing a new large acceptance polarimeter within the Crystal Ball at MAMI. The measured photon energy range of 300-700 MeV provi…
View article: New data on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:mover accent="true"><mml:mrow><mml:mi>γ</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">→</mml:mo></mml:mrow></mml:mover><mml:mover accent="true"><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">→</mml:mo></mml:mrow></mml:mover><mml:mo stretchy="false">→</mml:mo><mml:mi>η</mml:mi><mml:mi>p</mml:mi></mml:math> with polarized photons and protons and their implications for N⁎ → Nη decays
New data on with polarized photons and protons and their implications for N⁎ → Nη decays Open
The polarization observables T,E,P,H, and G in photoproduction of η mesons off protons are measured for photon energies from threshold to W=2400 MeV (T), 2280 MeV (E), 1620 MeV (P,H), or 1820 MeV (G), covering nearly the full solid angle. …
View article: Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead
Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead Open
View article: Cross section for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>γ</mml:mi><mml:mi>n</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mi>n</mml:mi></mml:mrow></mml:math> measured at the Mainz A2 experiment
Cross section for measured at the Mainz A2 experiment Open
The γ n → π 0 n differential cross section evaluated for 27 energy bins span the photon-energy range 290– 813 MeV (W = 1.195–1.553 GeV) and the pion c.m. polar production angles, ranging from 18° to 162°, making use of model-dependent nucl…
View article: Measurement of the Helicity Asymmetry $E$ for the reaction $ γp\to π^0 p$
Measurement of the Helicity Asymmetry $E$ for the reaction $ γp\to π^0 p$ Open
A measurement of the double-polarization observable $E$ for the reaction $γp\to π^0 p$ is reported. The data were taken with the CBELSA/TAPS experiment at the ELSA facility in Bonn using the Bonn frozen-spin butanol (C$_4$H$_9$OH) target, …
View article: Deuteron photodisintegration by polarized photons in the region of the d⁎(2380)
Deuteron photodisintegration by polarized photons in the region of the d⁎(2380) Open