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Photoproduction of the $f_2(1270)$ meson using the CLAS detector
/ CLAS Collaboration
The quark structure of the $f_2(1270)$ meson has, for many years, been assumed to be a pure quark-antiquark ($q\bar{q}$) resonance with quantum numbers $J^{PC} = 2^{++}$. Recently, it was proposed that the $f_2(1270)$ is a molecular state made from the attractive interaction of two $\rho$-mesons. [...]
arXiv:2010.16006; JLAB-PHY-20-3279.-
2021-02-25 - 6 p.
- Published in : Phys. Rev. Lett. 126 (2021) 082002
Fulltext: PDF; External link: JLAB
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2.
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The present and future of QCD
/ Achenbach, P. (Jefferson Lab) ; Adhikari, D. (Virginia Tech.) ; Afanasev, A. (George Washington U. ; Jefferson Lab) ; Afzal, F. (Bonn U., HISKP ; Bonn U.) ; Aidala, C.A. (Michigan U.) ; Al-bataineh, A. (Jordan U. Sci. Tech. ; Yarmouk U. ; Kansas U.) ; Almaalol, D.K. (Illinois U., Urbana ; Illinois U., Urbana (main)) ; Amaryan, M. (Old Dominion U. ; Old Dominion U. (main)) ; Androić, D. (Zagreb U.) ; Armstrong, W.R. (Argonne ; Argonne, PHY) et al.
This White Paper presents the community inputs and scientific conclusions from the Hot and Cold QCD Town Meeting that took place September 23-25, 2022 at MIT, as part of the Nuclear Science Advisory Committee (NSAC) 2023 Long Range Planning process. A total of 424 physicists registered for the meeting. [...]
arXiv:2303.02579; JLAB-PHY-23-3808.-
2024-04-15 - 111 p.
- Published in : Nucl. Phys. A 1047 (2024) 122874
Fulltext: 2303.02579 - PDF; Publication - PDF; External link: JLab Document Server
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3.
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Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
/ Accardi, A. (Hampton U.) ; Achenbach, P. (Jefferson Lab) ; Adhikari, D. (Virginia Tech.) ; Afanasev, A. (George Washington U.) ; Akondi, C.S. (Florida State U.) ; Akopov, N. (Yerevan Phys. Inst.) ; Albaladejo, M. (Valencia U., IFIC) ; Albataineh, H. (Texas A-M ; HARC, Woodlands) ; Albrecht, M. (Jefferson Lab) ; Almeida-Zamora, B. (Sonora U.) et al.
This document presents the initial scientific case for upgrading the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab (JLab) to 22 GeV. It is the result of a community effort, incorporating insights from a series of workshops conducted between March 2022 and April 2023. [...]
arXiv:2306.09360; JLAB-PHY-23-3840; JLAB-THY-23-3848.-
2024-09-04 - 139 p.
- Published in : Eur. Phys. J. A 60 (2024) 173
Fulltext: PDF; External link: JLab Document Server
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4.
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Pion and Kaon Structure at the Electron-Ion Collider
/ Aguilar, Arlene C. (Campinas State U.) ; Ahmed, Zafir (Regina U.) ; Aidala, Christine (Michigan U.) ; Ali, Salina (Catholic U.) ; Andrieux, Vincent (Illinois U., Urbana (main) ; CERN) ; Arrington, John (Argonne (main)) ; Bashir, Adnan (IFM-UMSNH, Michoacan) ; Berdnikov, Vladimir (Catholic U.) ; Binosi, Daniele (ECT, Trento ; Fond. Bruno Kessler, Trento) ; Chang, Lei (Nankai U.) et al.
Understanding the origin and dynamics of hadron structure and in turn that of atomic nuclei is a central goal of nuclear physics. This challenge entails the questions of how does the roughly 1 GeV mass-scale that characterizes atomic nuclei appear; why does it have the observed value; and, enigmatically, why are the composite Nambu-Goldstone (NG) bosons in quantum chromodynamics (QCD) abnormally light in comparison? In this perspective, we provide an analysis of the mass budget of the pion and proton in QCD; discuss the special role of the kaon, which lies near the boundary between dominance of strong and Higgs mass-generation mechanisms; and explain the need for a coherent effort in QCD phenomenology and continuum calculations, in exa-scale computing as provided by lattice QCD, and in experiments to make progress in understanding the origins of hadron masses and the distribution of that mass within them. [...]
arXiv:1907.08218; NJU-INP 001/19.-
2019-10-31 - 16 p.
- Published in : Eur. Phys. J. A 55 (2019) 190
Fulltext: PDF;
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5.
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Electron-beam energy reconstruction for neutrino oscillation measurements
/ CLAS Collaboration
Neutrinos exist in one of three types or ‘flavours’—electron, muon and tau neutrinos—and oscillate from one flavour to another when propagating through space. This phenomena is one of the few that cannot be described using the standard model of particle physics (reviewed in ref. 1), and so its experimental study can provide new insight into the nature of our Universe (reviewed in ref. 2). [...]
2021 - 20 p.
- Published in : Nature 599 (2021) 565-570
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6.
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50 Years of Quantum Chromodynamics
/ Gross, Franz (Jefferson Lab ; William-Mary Coll.) ; Klempt, Eberhard (Bonn U., HISKP) ; Brodsky, Stanley J. (SLAC) ; Buras, Andrzej J. (TUM-IAS, Munich) ; Burkert, Volker D. (Jefferson Lab) ; Heinrich, Gudrun (KIT, Karlsruhe, TP) ; Jakobs, Karl (Freiburg U.) ; Meyer, Curtis A. (Carnegie Mellon U.) ; Orginos, Kostas (Jefferson Lab ; William-Mary Coll.) ; Strickland, Michael (Kent State U.) et al.
This paper presents a comprehensive review of both the theory and experimental successes of Quantum Chromodynamics, starting with its emergence as a well defined theory in 1972-73 and following developments and results up to the present day. Topics include a review of the earliest theoretical and experimental foundations; the fundamental constants of QCD; an introductory discussion of lattice QCD, the only known method for obtaining exact predictions from QCD; methods for approximating QCD, with special focus on effective field theories; QCD under extreme conditions; measurements and predictions of meson and baryon states; a special discussion of the structure of the nucleon; techniques for study of QCD at high energy, including treatment of jets and showers; measurements at colliders; weak decays and quark mixing; and a section on the future, which discusses new experimental facilities or upgrades currently funded. [...]
arXiv:2212.11107.-
2023-12 - 636 p.
- Published in : Eur. Phys. J. C 83 (2023) 1125
Fulltext: 2212.11107 - PDF; Publication - PDF; External link: JLAB Document Server
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7.
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Three-body scattering: Ladders and Resonances
/ Mikhasenko, M. (Bonn U., HISKP ; CERN) ; Wunderlich, Y. (Bonn U., HISKP) ; Jackura, A. (Indiana U., CEEM ; Indiana U.) ; Mathieu, V. (Jefferson Lab ; Madrid U.) ; Pilloni, A. (ECT, Trento ; INFN, Genoa ; Fond. Bruno Kessler, Trento) ; Ketzer, B. (Bonn U., HISKP) ; Szczepaniak, A.P. (Indiana U., CEEM ; Indiana U. ; Jefferson Lab)
We discuss unitarity constraints on the dynamics of a system of three interacting particles. We show how the short-range interaction that describes three-body resonances can be separated from the long-range exchange processes, in particular the one-pion-exchange process. [...]
arXiv:1904.11894; JLAB-THY-19-2924.-
2019-08-14 - 15 p.
- Published in : JHEP 1908 (2019) 080
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; External link: JLab Document Server
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8.
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Dark Sectors 2016 Workshop: Community Report
/ Alexander, Jim (Cornell U., Phys. Dept.) ; Battaglieri, Marco (INFN, Genoa) ; Echenard, Bertrand (Caltech) ; Essig, Rouven (SUNY, Stony Brook) ; Graham, Matthew (SLAC) ; Izaguirre, Eder (Perimeter Inst. Theor. Phys.) ; Jaros, John (SLAC) ; Krnjaic, Gordan (Fermilab) ; Mardon, Jeremy (Stanford U., Phys. Dept.) ; Morrissey, David (TRIUMF) et al.
This report, based on the Dark Sectors workshop at SLAC in April 2016, summarizes the scientific importance of searches for dark sector dark matter and forces at masses beneath the weak-scale, the status of this broad international field, the important milestones motivating future exploration, and promising experimental opportunities to reach these milestones over the next 5-10 years..
arXiv:1608.08632 ; FERMILAB-CONF-16-421.
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2016. - 66 p.
Fermilab Library Server (fulltext available) - Full text - Fulltext
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9.
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Interpretation of the LHCb $P_c$(4312)$^+$ Signal
/ Fernández-Ramírez, C. (Mexico U., ICN) ; Pilloni, A. (ECT, Trento ; Fond. Bruno Kessler, Trento ; INFN, Genoa) ; Albaladejo, M. (Jefferson Lab) ; Jackura, A. (Indiana U., CEEM ; Indiana U.) ; Mathieu, V. (Jefferson Lab) ; Mikhasenko, M. (CERN) ; Silva-Castro, J.A. (Mexico U., ICN) ; Szczepaniak, A.P. (Jefferson Lab ; Indiana U., CEEM ; Indiana U.)
/JPAC Collaboration
We study the nature of the new signal reported by LHCb in the J/psi p spectrum. Based on the S-matrix principles, we perform a minimum-bias analysis of the underlying reaction amplitude, focusing on the analytic properties that can be related to the microscopic origin of the Pc(4312) peak. [...]
arXiv:1904.10021; JLAB-THY-19-2921.-
2019-08-30 - 6 p.
- Published in : Phys. Rev. Lett. 123 (2019) 092001
Article from SCOAP3: PDF; Fulltext: PDF; External link: JLab Document Server
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10.
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A simulation tool for MRPC telescopes of the EEE project
/ Mandaglio, G. (Enrico Fermi Ctr., Rome ; Messina U. ; INFN, Catania) ; Abbrescia, M. (Bari U. ; INFN, Bari) ; Avanzini, C. (Enrico Fermi Ctr., Rome ; INFN, Pisa) ; Baldini, L. (Enrico Fermi Ctr., Rome ; INFN, Pisa ; Pisa U.) ; Ferroli, R.Baldini (Enrico Fermi Ctr., Rome ; INFN, Rome ; Rome, ISS) ; Batignani, G. (Enrico Fermi Ctr., Rome ; INFN, Pisa ; Pisa U.) ; Battaglieri, M. (Enrico Fermi Ctr., Rome ; Jefferson Lab ; INFN, Genoa) ; Boi, S. (Enrico Fermi Ctr., Rome ; Cagliari U. ; INFN, Cagliari) ; Bossin, E. (CERN) ; Carnesecchi, F. (Enrico Fermi Ctr., Rome ; U. Bologna, DIFA ; INFN, Bologna) et al.
The Extreme Energy Events (EEE) Project is mainly devoted to the study of the secondary cosmic ray radiation by using muon tracker telescopes made of three Multigap Resistive Plate Chambers (MRPC) each. The experiment consists of a telescope network mainly distributed across Italy, hosted in different building structures pertaining to high schools, universities and research centers. [...]
arXiv:2005.14644.-
2020-10-19 - 8 p.
- Published in : JINST 15 (2020) C10021
Fulltext: PDF;
In : XV Workshop on Resistive Plate Chambers and related detectors, Roma, Italy, 10 - 14 Feb 2020, pp.C10021
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