[Halld-cpp] CPP/NPP updated abstract for the APS 2025 conference

[Elton Smith]

Hi Ilya,

Below are a few suggestions for wording. In particular, it is usual to keep most of the abstract into one or two paragraphs.
The electromagnetic polarizability is a fundamental property of hadrons, which depends on the binding of their inner components. The measurement of the polarizability of the lightest hadrons - pions- provides a stringent test of QCD predictions. The “Charged Pion Polarizability” and “Neutral Pion Polarizabilitiy” experiments, recently conducted at Jefferson Lab, have focused on extracting pion polarizabilities through the precise measurement of the Primakoff photoproduction of pion pairs on a heavy nucleus. This represents a new technique for measurement, and it will be the first measurement of the neutral pion polarizability.
The experiments utilized the GlueX experimental setup with a lead target and muon chambers added, which, in conjunction with developed AI separation algorithms, enable effective background rejection of leptonic pair production. To improve the experimental systematics, data were taken at low intensity and a new trigger was added to the DAQ system. Significant progress has been made in the analysis of the data from these experiments, which is the main subject of this talk.




Elton Smith
elton at jlab.org
Cell: 757-749-5262




On Oct 23, 2024, at 9:35 AM, Ilya Larin via Halld-cpp <halld-cpp at jlab.org> wrote:


Dear Colleagues,
I have attached the updated abstract for APS 2025. Thank you for sending your comments.
There is still time for further suggestions, as it must be submitted by this Friday.
Thank you,
Ilya


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Recent Progress in Measurement of the Charged and Neutral Pion Polarizabilities at Jefferson Lab
Electromagnetic polarizability is a fundamental property of hadrons, depending on the binding of their inner components.
The measurement of the polarizability of the lightest hadrons - pions- provides a stringent test of QCD predictions.

The CPP and NPP experiments recently conducted at Jefferson Lab have focused on extracting pion polarizabilities through the precise measurement of the Primakoff photoproduction of pion pairs on heavy nucleus. This represents a new technique for measurement, and it will be the first measurement of the neutral pion polarizability.

The experiments utilized the GlueX experimental setup, with lead target and muon chambers added, which, in conjunction with developed AI separation algorithms, enabled effective background rejection of leptonic pair production. To improve the experimental systematics, the utilized beam intensity was reduced, and a new trigger was added to the DAQ system.

Significant progress has been made in the analysis of the data from these experiments, which is the main subject of this talk.



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