3rd Proton Mass Workshop; Origin and Perspective

→ America/New_York
Virtual (Argonne National Laboratory)

Virtual

Argonne National Laboratory

Physics Division Bdg. 203 9700 South Cass Avenue Argonne, IL 60439
Ian CLOËT (Argonne National Laboratory), Xiangdong JI (University of Maryland), Zein-Eddine MEZIANI (Argonne National Laboratory), Jianwei QIU (Jefferson Lab)
Description

The next major facility construction in the US is the Electron-Ion Collider planned at Brookhaven National Laboratory. A science assessment by the National Academy of Sciences (https://www.nap.edu/catalog/25171/an-assessment-of-us-based-electron-ion-collider-science) found three central questions that the facility should address, and among these is "How does the mass of the nucleon arise?"

This question goes to the essence of QCD and embodies many of its mysteries and emergent phenomena, such as color confinement. Its understanding is fundamental to the future of nuclear physics, and we think that addressing this question within QCD will expose deep connections and significantly impact the broader fields of cosmology, particle physics, condensed matter, and biology.

In the spirit of the questions posed by Hilbert in the 1900 Mathematics Congress and the Millennium Prize Problems in Mathematical Physics, we would like to identify key theoretical questions to further inform and guide the science program of the Electron-Ion Collider. Our hope is that by posing the right questions this workshop can have a lasting impact on our understanding of the visible universe.

More broadly, this workshop will address and hone key questions related to the proton mass. It is organized around four interelated areas which include the broader fields of physics, the fundamentals of QCD, lattice calculations, hadron models, and last but not least to  experiments and specific observables.

A sample of questions includes:

  1. Broader questions
    1. The nucleon mass is the most crucial gravitational charge in the universe below the scale of galaxies. How does the strong interaction scale or mass affect the visible universe?
    2. Can the nucleon's transverse momentum parton distributions reveal the temperature at which the nucleon is formed?
    3. What determines the QCD scale?
    4. What does QCD dynamics predict about the proton mass if the scale is just a parameter?
    5. How would the physical world (condensed matter, chemistry, and biology) change if Λ_QCD is increased or decreased by a factor of 2?
    6. What is the interplay between the Higgs and QCD mass generation mechanisms?
  2. Fundamentals of QCD
    1. What is the role of the trace anomaly in QCD? Does it reflect both color confinement and dimensional transmutation?
    2. What is the role of chiral symmetry breaking (CSB) in determining the nucleon mass? What is the interplay between the CSB and color confinement?
    3. Why are the nucleon resonances (with change of spin and isospin) separated by a large mass gap? 
    4. Can a relativistic Virial theorem tell us something deeper about the origin of mass?
  3. Lattice QCD calculations questions
    1. Can one calculate the anomaly contribution on the lattice?
    2. Can the lattice calculate the mass distribution in the nucleon?
    3. Why is the color magnetic field depleted inside the proton?
    4. How does the kinetic energy of quarks balance the color confinement energy of the gluon?
    5. Should a glue ball mass be lighter or heavier than the proton mass or 2 pions mass? If so why?
  4. Hadron models questions
    1. What is the relation between the trace anomaly and the MIT bag constant?
    2. Can AdS/CFT models tell us something deep about the proton mass?
    3. Can 2D models, or simple 4D models (sigma model, NJL model, etc.) tell us something about the mass?
    4. What is the interplay of the Higgs mechanism and QCD mass generation for the mass of hadrons (meson, baryons, XYZ, etc.) with heavy flavors?
1st Proton Mass Workshop
2nd Proton Mass Workshop
Participants
  • Abhay DESHPANDE
  • Adam FREESE
  • Alexander AUSTREGESILO
  • Alexandre CAMSONNE
  • Andrea SIGNORI
  • Andreas KRONFELD
  • Andreas METZ
  • Andreas SCHAFER
  • Anthony THOMAS
  • Aram KOTZINIAN
  • Arvind KUMAR
  • Asmita MUKHERJEE
  • Aurore COURTOY
  • Babak SALEHI KASMAEI
  • Bailing MA
  • Barbara PASQUINI
  • Bidyut ROY
  • Bowen XIAO
  • Burcu DURAN
  • Carl CARLSON
  • Carlos MUNOZ CAMACHO
  • Cedric LORCE
  • Chandradoy CHATTERJEE
  • Chao PENG
  • Chueng-Ryong JI
  • Churamani PAUDEL
  • Constantia ALEXANDROU
  • Cynthia KEPPEL
  • David FRENKLAKH
  • David POTTERVELD
  • David RICHARDS
  • Deepak BHETUWAL
  • Defu HOU
  • Dipangkar DUTTA
  • Dmitri KHARZEEV
  • Dominique MARCHAND
  • Donald GEESAMAN
  • Eli PIASETZKY
  • Elke-Caroline ASCHENAUER
  • Enrique RUIZ ARRIOLA
  • Eugene CHUDAKOV
  • Fatiha BENMOKHTAR
  • Feng YUAN
  • Fernando NAVARRA
  • Francesco MURGIA
  • Franco BRADAMANTE
  • Fredrick OLNESS
  • Garth HUBER
  • Gauri DEVI
  • Gen WANG
  • George STERMAN
  • Gerald MILLER
  • GORDON BAYM
  • Gregoris SPANOUDES
  • Gulshan RAI
  • Guy F. DE TERAMOND
  • Haiyan GAO
  • Hamlet MKRTCHYAN
  • HAMZA ATAC
  • Hariprashad RAVIKUMAR
  • Harleen DAHIYA
  • Henry KLEST
  • Hervé DUTRIEU
  • Huan HUANG
  • Håkan WENNLÖF
  • Ian CLOET
  • Igor KLEBANOV
  • Igor STRAKOVSKY
  • ismail ZAHED
  • Jamal JALILIAN-MARIAN
  • Jambul GEGELIA
  • Jay BENESCH
  • Jen-Chieh PENG
  • Jennifer RITTENHOUSE WEST
  • Jian-ping CHEN
  • Jiangyong JIA
  • Jianhua GAO
  • Jianwei QIU
  • Jihee KIM
  • John LAJOIE
  • John NEGELE
  • Julia PANTELEEVA
  • Jung Keun AHN
  • Junqi XIE
  • Kawtar HAFIDI
  • Kayleigh GATES
  • Kehfei LIU
  • Kiminad MAMO
  • Kong TU
  • Krishna RAJAGOPAL
  • Krzysztof PIOTRZKOWSKI
  • Kyle SHIELLS
  • Kyungseon JOO
  • Lamiaa EL FASSI
  • Lawrence CARDMAN
  • Leonard GAMBERG
  • Liping GAN
  • Lubomir PENTCHEV
  • MANISHA KUMARI
  • Manoj JADHAV
  • Marc VANDERHAEGHEN
  • Marco RADICI
  • Maria ZUREK
  • Mariusz PRZYBYCIEN
  • Mark BAKER
  • Mark DALTON
  • Marshall SCOTT
  • Martha CONSTANTINOU
  • Masakiyo KITAZAWA
  • Mathieu EHRHART
  • Mattia DALLA BRIDA
  • Maxim POLYAKOV
  • Michael FINGER
  • Michael PAOLONE
  • Mikhail SHIFMAN
  • Ming LIU
  • Miroslav FINGER
  • Monika BHARTI
  • Mriganka Mouli MONDAL
  • Narbe KALANTARIANS
  • Narinder KUMAR
  • Nicole D'HOSE
  • Nikos SPARVERIS
  • Nilmani MATHUR
  • Oliver BAER
  • Oscar RONDON
  • Patrick FRITZSCH
  • Paul E REIMER
  • Paul SOUDER
  • Pavel NADOLSKY
  • Pawel NADEL-TURONSKI
  • Pervez HOODBHOY
  • Peter PETRECZKY
  • Peter SCHWEITZER
  • Peter TANDY
  • Philip MANNHEIM
  • Piet MULDERS
  • Rachid NOUICER
  • Ragul NAGARAJAN
  • Rajesh KUMAR
  • Raphaël DUPRÉ
  • Raza SUFIAN
  • Richard YORK
  • Robert EDWARDS
  • Robert JAFFE
  • Rolf ENT
  • Saraswati PANDEY
  • Sean DOBBS
  • Seonho CHOI
  • Sergey SYRITSYN
  • Shivanshi TIWARI
  • Shohini BHATTACHARYA
  • SHUBHAM SHARMA
  • Shunzo KUMANO
  • Shuo JIA
  • Simone RODINI
  • Sinead RYAN
  • Stanley BRODSKY
  • Stefan DIEHL
  • Stefan SINT
  • Steffen STRAUCH
  • Stephane PLATCHKOV
  • Stephen WOOD
  • Suneel DUTT
  • Susan SCHADMAND
  • Swagato MUKHERJEE
  • Sylvester JOOSTEN
  • Thomas CORMIER
  • Tobias FREDERICO
  • Tomas POLAKOVIC
  • TRILOKI TRILOKI
  • Ulf-G. MEISSNER
  • Umberto D'ALESIO
  • Valery KUBAROVSKY
  • Vardan TADEVOSYAN
  • Varsha GAUTAM
  • Victor GONCALVES
  • Victoria LAGERQUIST
  • Vignesh SUBRAMANIYAN
  • Vijay KUMAR
  • Vladimir BRAUN
  • Volker CREDE
  • Wally MELNITCHOUK
  • Wei KOU
  • Wei LI
  • Wen-Chen CHANG
  • Whitney ARMSTRONG
  • WILLEM VAN OERS
  • William BROOKS
  • William FOCILLON
  • Wim COSYN
  • Wojciech BRONIOWSKI
  • Xiang GAO
  • Xiangdong JI
  • Xiangpeng WANG
  • Xuanbo TONG
  • Ye TIAN
  • Yizhuang LIU
  • Yizhuang LIU
  • Yong ZHAO
  • Yongseok OH
  • Yoshitaka HATTA
  • Yuji GOTO
  • Yuji KOIKE
  • Yushan SU
  • Zein-Eddine MEZIANI
  • Zhenyu YE
  • Zhiwen ZHAO
  • Zhongbo KANG
  • Zhuoyi PANG
  • Zisis PAPANDREOU
  • Ziyue ZHANG
Paula Dahlberg (Workshop Coordinator)