Light-quark masses and QCD condensates from low-energy e+e− data: a nonconventional approach

1985 ◽  
Vol 90 (4) ◽  
pp. 378-387
Author(s):  
P. Loverre ◽  
G. Penso ◽  
C. Verzegnassi
Keyword(s):  
Light Quark ◽  
Low Energy ◽  
Quark Masses

η DECAYS WITH WASA DETECTOR

2005 ◽  
Vol 20 (02n03) ◽  
pp. 536-538
Author(s):  
◽  
ANDRZEJ KUPŚĆ
Keyword(s):  
Standard Model ◽  
Light Quark ◽  
Storage Rings ◽  
Low Energy ◽  
Eta Mesons ◽  
Valuable Source ◽  
Quark Masses ◽  
Experimental Programme ◽  
The Standard Model ◽  
Source Of Information

Experimental programme of eta decays carried out at WASA detector is presented. Not-so-rare eta decays are well suited as a low energy QCD laboratory. For example decay η→3π is a valuable source of information on light quark masses. In very rare eta decays such as η→e+e- and η→π°e+e- fundamental aspects of the Standard Model can be tested. Production reactions – sources of eta mesons for the decay studies at storage rings such as CELSIUS and COSY are discussed. Prospects of eta decay physics for WASA@COSY are presented.

DECAYS OF η AND η' MESONS–AN INTRODUCTION

2009 ◽  
Vol 18 (05n06) ◽  
pp. 1255-1270 ◽  
Author(s):  
ANDRZEJ KUPSC
Keyword(s):  
Light Quark ◽  
Low Energy ◽  
Strong Interactions ◽  
Hadronic Decays ◽  
Main Theme ◽  
Elementary Processes ◽  
Particle Distributions ◽  
Quark Masses ◽  
Energy Quantum ◽  
Three Body

Decays of η and η' mesons are a laboratory for low energy strong interactions. The rate of isospin breaking decays into three pions constrain ratios of the light quark masses. Particle distributions from hadronic decays allow to study the elementary processes of the low energy Quantum Chromodynamics: π - π and π - η interactions. Radiative and conversion decays of the η and η' mesons provide information about internal structure of the mesons and the decay mechanism is strongly influenced by vector meson resonances. The lecture gives an introduction to the common decays of η and η' mesons. The main theme of the lecture are three body decays: hadronic decays, radiative decays into π+π-γ, π0γγ and Dalitz decays into ℓ+ℓ-γ.

scholarly journals DK I = 0, $$ D\overline{K} $$ I = 0, 1 scattering and the $$ {D}_{s0}^{\ast } $$(2317) from lattice QCD

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Gavin K. C. Cheung ◽  
◽  
Christopher E. Thomas ◽  
David J. Wilson ◽  
Graham Moir ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Scattering Amplitudes ◽  
Lattice Qcd ◽  
Finite Volume ◽  
Energy Region ◽  
Light Quark ◽  
Bound State ◽  
Vector Resonance ◽  
Quark Masses ◽  
Partial Waves

Abstract Elastic scattering amplitudes for I = 0 DK and I = 0, 1 $$ D\overline{K} $$ D K ¯ are computed in S, P and D partial waves using lattice QCD with light-quark masses corresponding to mπ = 239 MeV and mπ = 391 MeV. The S-waves contain interesting features including a near-threshold JP = 0+ bound state in I = 0 DK, corresponding to the $$ {D}_{s0}^{\ast } $$ D s 0 ∗ (2317), with an effect that is clearly visible above threshold, and suggestions of a 0+ virtual bound state in I = 0 $$ D\overline{K} $$ D K ¯ . The S-wave I = 1 $$ D\overline{K} $$ D K ¯ amplitude is found to be weakly repulsive. The computed finite-volume spectra also contain a deeply-bound D* vector resonance, but negligibly small P -wave DK interactions are observed in the energy region considered; the P and D-wave $$ D\overline{K} $$ D K ¯ amplitudes are also small. There is some evidence of 1+ and 2+ resonances in I = 0 DK at higher energies.

scholarly journals Light quark masses in multi-quark interactions

2013 ◽  
Vol 49 (1) ◽  
Author(s):  
A. A. Osipov ◽  
B. Hiller ◽  
A. H. Blin
Keyword(s):  
Light Quark ◽  
Quark Masses

scholarly journals The LHC Higgs boson discovery: Implications for Finite Unified Theories

2014 ◽  
Vol 29 (18) ◽  
pp. 1430032 ◽  
Author(s):  
S. Heinemeyer ◽  
M. Mondragón ◽  
G. Zoupanos
Keyword(s):  
Higgs Boson ◽  
Predictive Power ◽  
Low Energy ◽  
Boson Mass ◽  
Higgs Boson Mass ◽  
Light Higgs Boson ◽  
Quark Masses ◽  
Grand Unified Theories ◽  
Unified Theories ◽  
Discovery Potential

Finite Unified Theories (FUTs) are N = 1 supersymmetric Grand Unified Theories (GUTs) which can be made finite to all-loop orders, based on the principle of reduction of couplings, and therefore are provided with a large predictive power. We confront the predictions of an SU(5) FUT with the top and bottom quark masses and other low-energy experimental constraints, resulting in a relatively heavy SUSY spectrum, naturally consistent with the nonobservation of those particles at the LHC. The light Higgs boson mass is automatically predicted in the range compatible with the Higgs discovery at the LHC. Requiring a light Higgs boson mass in the precise range of Mh= 125.6 ±2.1 GeV favors the lower part of the allowed spectrum, resulting in clear predictions for the discovery potential at current and future pp, as well as future e+e-colliders.

scholarly journals Light quark masses from the lattice

2000 ◽  
Vol 83-84 ◽  
pp. 173-175
Author(s):  
M. Göckeler ◽  
R. Horsley ◽  
B. Klaus ◽  
W. Kürzinger ◽  
H. Oelrich ◽  
...  
Keyword(s):  
Light Quark ◽  
Quark Masses

scholarly journals LIGHT QUARK MASSES: A STATUS REPORT AT DPF 2000

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 591-599 ◽  
Author(s):  
Rajan Gupta ◽  
Kim Maltman
Keyword(s):  
Lattice Qcd ◽  
Light Quark ◽  
Status Report ◽  
Quark Masses ◽  
Coherent Picture

A summary of the extraction of light quark masses from both QCD sumrules and lattice QCD simulations is presented. The focus is on providing a careful statement of the potential weaknesses in each calculation, and on integrating the work of different collaborations to provide a coherent picture.

scholarly journals Light Hadron Spectrum, Renormalization Constants and Light Quark Masses with Two Dynamical Fermions

2005 ◽  
Vol 140 ◽  
pp. 246-248 ◽  
Author(s):  
D. Bećirević ◽  
P. Boucaud ◽  
V. Giménez ◽  
V. Lubicz ◽  
G. Martinelli ◽  
...  
Keyword(s):  
Light Quark ◽  
Hadron Spectrum ◽  
Quark Masses ◽  
Light Hadron ◽  
Renormalization Constants
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