Daniel Lersch
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View article: Toward an event-level analysis of hadron structure using differential programming
Toward an event-level analysis of hadron structure using differential programming Open
Reconstructing the internal properties of hadrons in terms of fundamental quark and gluon degrees of freedom is a central goal in nuclear and particle physics. This effort lies at the core of major experimental programs, such as the Jeffer…
View article: Search for photoproduction of axionlike particles at GlueX
Search for photoproduction of axionlike particles at GlueX Open
We present a search for axion-like particles, $a$, produced in photon-proton collisions at a center-of-mass energy of approximately 4 GeV, focusing on the scenario where the $a$-gluon coupling is dominant. The search uses $a\\to\\gamma\\ga…
View article: Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
Strange Hadron Spectroscopy with Secondary KL Beam in Hall D Open
We propose to create a secondary beam of neutral kaons in Hall D at Jefferson Lab to be used with the GlueX experimental setup for strange hadron spectroscopy. The superior CEBAF electron beam will enable a flux on the order of $1\times 10…
View article: First Measurement of Near-Threshold <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>ψ</mml:mi></mml:math> Exclusive Photoproduction off the Proton
First Measurement of Near-Threshold Exclusive Photoproduction off the Proton Open
We report on the measurement of the γp→J/ψp cross section from E_{γ}=11.8 GeV down to the threshold at 8.2 GeV using a tagged photon beam with the GlueX experiment. We find that the total cross section falls toward the threshold less steep…
View article: Studying<i>η</i>-Meson Decays with WASA-at-COSY
Studying<i>η</i>-Meson Decays with WASA-at-COSY Open
The η-meson is a unique tool in a way that it provides access to (rare) decay processes, which allow to probe symmetry breaking phenomena, determine transition form factors, or to explore the anomalous sector of QCD. Those decays have been…