Revisiting the proton mass decomposition

Metz, Andreas; Pasquini, B.; Rodini, Simone

doi:10.1103/physrevd.102.114042

Cited by 74 publications

(92 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nonetheless, no matter how one chooses to cut the pie, a very large fraction of the proton's mass emerges as a dynamical consequence of strong interactions within QCD. There are also recent theoretical development on the renormalization and decomposition of the EMT trace [287][288][289], and also the numerical results for the QED and QCD cases [290][291][292].…”

Section: Proton Massmentioning

confidence: 99%

Electron-ion collider in China

et al. 2021

View full text Add to dashboard Cite

Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons as well as nuclei. As a future high energy nuclear physics project, an Electron-ion collider in China (EicC) has been proposed. It will be constructed based on an upgraded heavy-ion accelerator, High Intensity heavy-ion Accelerator Facility (HIAF) which is currently under construction, together with a new electron ring. The proposed collider will provide highly polarized electrons (with a polarization of ∼80%) and protons (with a polarization of ∼70%) with variable center of mass energies from 15 to 20 GeV and the luminosity of (2–3) × 1033 cm−2 · s−1. Polarized deuterons and Helium-3, as well as unpolarized ion beams from Carbon to Uranium, will be also available at the EicC.The main foci of the EicC will be precision measurements of the structure of the nucleon in the sea quark region, including 3D tomography of nucleon; the partonic structure of nuclei and the parton interaction with the nuclear environment; the exotic states, especially those with heavy flavor quark contents. In addition, issues fundamental to understanding the origin of mass could be addressed by measurements of heavy quarkonia near-threshold production at the EicC. In order to achieve the above-mentioned physics goals, a hermetical detector system will be constructed with cutting-edge technologies.This document is the result of collective contributions and valuable inputs from experts across the globe. The EicC physics program complements the ongoing scientific programs at the Jefferson Laboratory and the future EIC project in the United States. The success of this project will also advance both nuclear and particle physics as well as accelerator and detector technology in China.

show abstract

Section: Proton Massmentioning

confidence: 99%

Electron-ion collider in China

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The mass decomposition in ref. [16], although technically correct in dimensional regularization, missed the key role that the anomalous term plays. We call the expectation value of H a in a state, E a , the quantum anomalous energy.…”

Section: Scalar and Tensor Energy And Relativistic Virial Theoremmentioning

confidence: 99%

“…Since the original work by one of the authors of the current paper [7,8], several papers that calculated the QCD Hamiltonian operator's matrix elements on the lattice have appeared in the literature [9][10][11][12]. Alternative structures of the QCD Hamiltonian have also been proposed and analyzed [13][14][15][16]. Proposals have been made to measure the anomalous gluon matrix element through heavy-quarkonium electroproduction on the nucleon at Jefferson Lab and future Electron-Ion Collider [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Quantum anomalous energy effects on the nucleon mass

Liu

2021

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

Apart from the quark and gluon kinetic and potential energies, the nucleon mass includes a novel energy of pure quantum origin resulting from anomalous breaking of scale symmetry. We demonstrate the effects of this quantum anomalous energy (QAE) in QED, as well as in a toy 1+1 dimensional non-linear sigma model where it contributes non-perturbatively, in a way resembling the Higgs mechanism for the masses of matter particles in electro-weak theory. The QAE contribution to the nucleon mass can be explained using a similar mechanism, in terms of a dynamical response of the gluonic scalar field through Higgs-like couplings between the nucleon and scalar resonances. In addition, the QAE sets the scale for other energies in the nucleon through a relativistic virial theorem, and contributes a negative pressure to confine the colored quarks.

show abstract

“…quark mass) from the kinetic and potential energies. A three-term decomposition of T 00 of this form has been discussed recently, along with the corresponding renormalized operators in dimensional regularization (DR) in minimal-subtraction-type (MS) schemes [6,7].…”

Section: Jhep11(2021)121 1 Introductionmentioning

confidence: 99%

Energy-momentum tensor in QCD: nucleon mass decomposition and mechanical equilibrium

Lorcé

Metz

Pasquini

et al. 2021

J. High Energ. Phys.

View full text Add to dashboard Cite

We review and examine in detail recent developments regarding the question of the nucleon mass decomposition. We discuss in particular the virial theorem in quantum field theory and its implications for the nucleon mass decomposition and mechanical equilibrium. We reconsider the renormalization of the QCD energy-momentum tensor in minimal-subtraction-type schemes and the physical interpretation of its components, as well as the role played by the trace anomaly and Poincaré symmetry. We also study the concept of “quantum anomalous energy” proposed in some works as a new contribution to the nucleon mass. Examining the various arguments, we conclude that the quantum anomalous energy is not a genuine contribution to the mass sum rule, as a consequence of translation symmetry.

show abstract

Revisiting the proton mass decomposition

Cited by 74 publications

References 63 publications

Electron-ion collider in China

Electron-ion collider in China

Quantum anomalous energy effects on the nucleon mass

Energy-momentum tensor in QCD: nucleon mass decomposition and mechanical equilibrium

Contact Info

Product

Resources

About