From sharice at jlab.org Thu Nov 13 16:03:13 2025 From: sharice at jlab.org (Sharice Smith) Date: Thu, 13 Nov 2025 21:03:13 +0000 Subject: [Jlabsa_gs] GSPDA Lunch Seminar - Wednesday, November 19, 2025 Message-ID: Jefferson Lab's Graduate Student and Post-Doc Association Wiki: https://gspda.jlab.org/wiki/index.php/Main_Page This program is supported by the Initiatives Fund Program, a JSA commitment, to support programs, initiatives, and activities that further the scientific outreach, promote the science, education and technology of Jefferson Lab and benefit the Lab's extended user community in ways that complement the Lab's basic and applied research missions. Wednesday, November 19, 2025 ***CC F326/327*** 12:00 pm - 1:00 pm ???? "Parton structure of the pion and kaon from QCD analysis of experimental & lattice data" Wally Melnitchouk Abstract: This talk will review recent results from the JAM Collaboration on pion and kaon parton distribution functions (PDFs), constrained by experimental Drell-Yan and leading neutron electroproduction data, together with lattice QCD calculations of PDF moments. The analysis indicates a softer valence up-quark distribution in the K+ compared with the ?+, and provides the first empirical evidence for significantly different valence up and anti-strange densities in the kaon. Inclusion of recent lattice calculations of gluonic pseudo Ioffe-time distributions also significantly reduces uncertainties on the gluon PDF, revealing a higher gluon density in the pion at large momentum fractions than in the proton. -------------- next part -------------- An HTML attachment was scrubbed... URL: From sharice at jlab.org Tue Nov 18 08:45:39 2025 From: sharice at jlab.org (Sharice Smith) Date: Tue, 18 Nov 2025 13:45:39 +0000 Subject: [Jlabsa_gs] Reminder GSPDA Lunch Seminar - *Tomorrow* Wednesday, November 19, 2025 Message-ID: Jefferson Lab's Graduate Student and Post-Doc Association Wiki: https://gspda.jlab.org/wiki/index.php/Main_Page This program is supported by the Initiatives Fund Program, a JSA commitment, to support programs, initiatives, and activities that further the scientific outreach, promote the science, education and technology of Jefferson Lab and benefit the Lab's extended user community in ways that complement the Lab's basic and applied research missions. Wednesday, November 19, 2025 ***CC F326/327*** 12:00 pm - 1:00 pm ???? "Parton structure of the pion and kaon from QCD analysis of experimental & lattice data" Wally Melnitchouk Abstract: This talk will review recent results from the JAM Collaboration on pion and kaon parton distribution functions (PDFs), constrained by experimental Drell-Yan and leading neutron electroproduction data, together with lattice QCD calculations of PDF moments. The analysis indicates a softer valence up-quark distribution in the K+ compared with the ?+, and provides the first empirical evidence for significantly different valence up and anti-strange densities in the kaon. Inclusion of recent lattice calculations of gluonic pseudo Ioffe-time distributions also significantly reduces uncertainties on the gluon PDF, revealing a higher gluon density in the pion at large momentum fractions than in the proton. -------------- next part -------------- An HTML attachment was scrubbed... URL: From sharice at jlab.org Wed Nov 19 09:29:22 2025 From: sharice at jlab.org (Sharice Smith) Date: Wed, 19 Nov 2025 14:29:22 +0000 Subject: [Jlabsa_gs] Reminder GSPDA Lunch Seminar - **TODAY** Wednesday, November 19, 2025 In-Reply-To: References: Message-ID: Jefferson Lab's Graduate Student and Post-Doc Association Wiki: https://gspda.jlab.org/wiki/index.php/Main_Page This program is supported by the Initiatives Fund Program, a JSA commitment, to support programs, initiatives, and activities that further the scientific outreach, promote the science, education and technology of Jefferson Lab and benefit the Lab's extended user community in ways that complement the Lab's basic and applied research missions. Wednesday, November 19, 2025 ***CC F326/327*** 12:00 pm - 1:00 pm ???? "Parton structure of the pion and kaon from QCD analysis of experimental & lattice data" Wally Melnitchouk Abstract: This talk will review recent results from the JAM Collaboration on pion and kaon parton distribution functions (PDFs), constrained by experimental Drell-Yan and leading neutron electroproduction data, together with lattice QCD calculations of PDF moments. The analysis indicates a softer valence up-quark distribution in the K+ compared with the ?+, and provides the first empirical evidence for significantly different valence up and anti-strange densities in the kaon. Inclusion of recent lattice calculations of gluonic pseudo Ioffe-time distributions also significantly reduces uncertainties on the gluon PDF, revealing a higher gluon density in the pion at large momentum fractions than in the proton. -------------- next part -------------- An HTML attachment was scrubbed... URL: