<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div><p style="text-align: center; border: medium none; padding: 0in; margin: 0px;" data-mce-style="text-align: center; padding: 0in; margin: 0px;"><strong><span style="font-size: 48.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 48.0pt; line-height: 107%; font-family: 'Times New Roman',serif;">Physics Seminar</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 36.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 36.0pt; font-family: 'Times New Roman',serif;">Emanuele Nocera</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 20.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; font-family: 'Times New Roman',serif;"> </span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 22.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 22.0pt; font-family: 'Times New Roman',serif;">NIKHEF – Dutch National Institute for Subatomic Physics</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 20.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; font-family: 'Times New Roman',serif;"> </span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><em><span style="font-size: 20.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; font-family: 'Times New Roman',serif;">Neural Network Parton Distributions from High Precision Collider Data</span></em></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><em><span style="font-size: 18.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 18.0pt; font-family: 'Times New Roman',serif;"> </span></em></p><p style="margin: 0px; line-height: normal;" data-mce-style="margin: 0px; line-height: normal;"><span style="font-size: 9.0pt; font-family: CMBX9;" data-mce-style="font-size: 9.0pt; font-family: CMBX9;"> </span></p><p style="margin: 0px; line-height: normal;" data-mce-style="margin: 0px; line-height: normal;"><span style="font-size: 9.0pt; font-family: CMBX9;" data-mce-style="font-size: 9.0pt; font-family: CMBX9;"> </span></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;"><strong><span style="font-size: 18.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 18.0pt; font-family: 'Times New Roman',serif;">Abstract:</span></strong></p><p style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-size: 14.0pt; line-height: 107%; font-family: 'Arial',sans-serif; color: black;" data-mce-style="font-size: 14.0pt; line-height: 107%; font-family: 'Arial',sans-serif; color: black;"> </span></p><p style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-size: 12.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 12.0pt; line-height: 107%; font-family: 'Times New Roman',serif;">The NNPDF collaboration determines the parton distribution functions (PDFs) of the proton, a fundamental tool in the theoretical description of the high-energy scattering of this particle, from a global analysis of experimental data. Contemporary methods of artificial intelligence are used, <br> among which neural networks to provide a minimally biased parametrisation of the PDFs. In this talk, I review recent progress in the NNPDF analyses, including the impact of the most recent data from the Large Hadron Collider, the effect of including large- and small-x resummations, the determination of the strong coupling constant from PDFs, and a proposal to systematically include theoretical uncertainties in PDF determinations.</span></p><p style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-size: 14.0pt; line-height: 107%; font-family: 'Arial',sans-serif; color: black;" data-mce-style="font-size: 14.0pt; line-height: 107%; font-family: 'Arial',sans-serif; color: black;"> </span></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 18.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 18.0pt; line-height: 107%; font-family: 'Times New Roman',serif;"> </span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 18.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 18.0pt; line-height: 107%; font-family: 'Times New Roman',serif;">Thursday, November 8, 2018</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 18.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 18.0pt; line-height: 107%; font-family: 'Times New Roman',serif;">11:00am</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 18.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 18.0pt; line-height: 107%; font-family: 'Times New Roman',serif;">CEBAF Center – Auditorium</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><br> <br></p></div><div><br></div><div data-marker="__SIG_POST__">-- <br></div><div>Stephanie Tysor<br>Hall A Administrative Assistant<br>Thomas Jefferson National Accelerator Facility<br>(office)757-269-6005 (fax)757-269-5235</div></div></body></html>