scholarly journals Newly observed X(4630): a new charmoniumlike molecule

2021 ◽  
Vol 81 (9) ◽  
Author(s):  
Xin-Dian Yang ◽  
Fu-Lai Wang ◽  
Zhan-Wei Liu ◽  
Xiang Liu

AbstractVery recently, the LHCb Collaboration at the Large Hadron Collider at CERN observed new resonance X(4630). The X(4630) is decoded as a charmoniumlike molecule with hidden-strange quantum number well in the one-boson-exchange mechanism. Especially, the study of its hidden-charmed decays explicitly shows the dominant role of $$J/\psi \phi $$ J / ψ ϕ among all allowed hidden-charmed decays of the X(4630), which enforces the conclusion of X(4630) as a charmoniumlike molecule. The discovery of the X(4630) is a crucial step of constructing charmoniumlike molecule zoo.

Author(s):  
Paolo Desideri

This chapter discusses first the general cosmological principles which lie behind Plutarch’s historiographical work, such as can be recovered through significant passages of his Delphic Dialogues. Second, it investigates the reasons why Plutarch wrote biographies, and more specifically parallel biographies, instead of outright histories: in this way, Plutarch aimed to emphasize, on the one hand, the dominant role of individual personalities in the political world of his own time, and, on the other hand, the mutual and exclusive relevance of Greece and Rome in the history of human culture. Third, the chapter seeks to connect the rise-and-fall pattern, typical of biography, with the general rise-and-fall pattern which Plutarch recognizes both in the Greek and in the Roman civilizations; through that connection one can rule out the idea that Plutarch had any providential view of history. Finally, some reflections are offered on Nietzsche’s special interest in Plutarch’s biographies.


2011 ◽  
Vol 26 (02) ◽  
pp. 87-100
Author(s):  
JAMES MAXIN ◽  
VAN E. MAYES ◽  
D. V. NANOPOULOS

No-scale supergravity is a framework where it is possible to naturally explain radiative electroweak symmetry breaking and correlate it with the effective SUSY breaking scale. Many string compactifications have a classical no-scale structure, resulting in a one-parameter model (OPM) for the supersymmetry breaking soft terms, which results in a highly constrained subset of mSUGRA. We investigate the allowed supersymmetry parameter space for a generic one-parameter model taking into account the most recent experimental constraints. We also survey the possible signatures which may be observable at the Large Hadron Collider (LHC). Finally, we compare collider signatures of OPM to those from a model with non-universal soft terms, in particular those of an intersecting D6-brane model.


Scrinium ◽  
2007 ◽  
Vol 3 (1) ◽  
pp. 213-229 ◽  
Author(s):  
Andrei Orlov ◽  
Alexander Golitzin

In the Second Temple apocalyptic materials visionaries normally «see» the extent of the divine glory, God's Kavod, often portrayed as enthroned anthropomorphic figure. As a consequence of this encounter, the visionary experiences a dra¬matic external metamorphosis which often affects his face, limbs, and garments, making them luminescent. In spite of the dominant role of the Kavod pattern in biblical and apocalyptic theophanic accounts, it becomes increasingly challenged in the postbiblical rabbinic and patristic environments which offered new understandings of the transformational vision. In these new developments, one can see a growing emphasis on the interiorization of the visionary experience. The article investigates the formative role of the Macarian Homilies in the transition from outer to inner in the transformational visions of Eastern Christian tradition.


Author(s):  
D. A. Voevodin ◽  
G. N. Rozanova ◽  
A. V. Poddubikov ◽  
N. A. Mikhailova

The formation of pro-/eukaryotic systems is the general biological mechanism of formation and variability of the phenotype of plants, animals, human beings under the influence of external Wednesday, i.e. formation of adaptive potency conditions to external Wednesday that increases the «biological status» prokaryotic structures in sustaining body health. Prominent role in the formation of the phenotype of micro media, immunological tolerance (immunological programming), as a basis for the formation of individual pro-/eukaryotic interactions in perinatal age, the dominant role of maternal influence in this process on the one hand, micro-variability due to external stress impact on the other, makes it possible to consider pro-/eukaryotic interaction as a possible mechanism of perinatal programming and epigenetics inheritance and therefore, as one possible approach for correction of chronic and congenital pathology. This points to the need to improve monitoring ofthe formation microbiocenosis of children, improve the methods of assessment and correction.


2018 ◽  
Vol 33 (17) ◽  
pp. 1850098 ◽  
Author(s):  
P. Schulz ◽  
G. Wolschin

We present an analysis of centrality-dependent pseudorapidity distributions of produced charged hadrons in pPb and PbPb collisions at the Large Hadron Collider (LHC) energy of [Formula: see text] = 5.02 TeV, and of minimum-bias pPb collisions at 8.16 TeV within the non-equilibrium-statistical relativistic diffusion model (RDM). In a three-source approach, the role of the fragmentation sources is emphasized. Together with the Jacobian transformation from rapidity to pseudorapidity and the limiting fragmentation conjecture, these are essential for modeling the centrality dependence. For central PbPb collisions, a prediction at the projected FCC energy of [Formula: see text] = 39 TeV is made.


Author(s):  
Alan G. Gross

In 2008 a rap video by Kate McAlpine went viral (nearly eight million views at present). Not your typical rap video, it takes place in the tunnel of the Large Hadron Collider and on the grounds 100 feet above. During the performance, the computer-generated voice of Stephen Hawking chimes in as part of a periodic call and response. Throughout, the lyrics are replete with technical terms like “protons,” “lead ions,” “antimatter,” “black holes,” “dark matter,” “Higgs boson,” “Standard Model,” “graviton,” “top quark,” and acronyms like “ALICE,” “ATLAS,” and “CMS.” Here is the central refrain: . . . The LHC accelerates the protons and the lead And the things that it discovers will rock you in the head. The Higgs boson, that’s the one that everybody talks about And it’s the one sure thing that this machine will sort out. . . . McAlpine’s was a prophesy that proved right on target. In 2016, François Englert and Peter Higgs won the Nobel Prize in physics for a conjecture they had made over a half century earlier, a mathematically driven leap of faith that became a scientific fact when the Higgs boson was detected—a hitherto mysterious but absolutely central member of the particle zoo. It was a discovery that confirmed the otherwise highly confirmed Standard Model, the explanatory centerpiece of the quantum world. At five billion dollars, the detector of the Higgs, the Large Hadron Collider, is the most expensive scientific apparatus ever built. It is a Mount Everest of machines, the apotheosis of the technological sublime. This form of sublimity is near the center of Lisa Randall’s professional life, the only means by which her deepest conjectures about the universe can be demonstrated. Hers is a flight into the scientific stratosphere tethered to events that she hopes will be observed by two incarnations of the technological sublime: the Large Hadron Collider or the GAIA satellite. When the UK funding for the Large Hadron Collider was still in question, Science Minister William Waldegrave challenged British physicists, telling them “that if anyone could explain what all the fuss was about, in plain English, on one sheet of paper, then he would reward that person with a bottle of vintage champagne.”


Author(s):  
Richard Wigmans

In this last chapter, some scientific discoveries are described in which calorimeters have played a crucial role. The chosen examples were all awarded a Nobel prize in physics. The first example concerns the discovery of the intermediate vector bosons (W and Z) by the experiments UA1 and UA2 at CERN (1982). More than anything else, this discovery has been crucial for the dominant role that calorimeters have played in the design of experiments at the subsequent generation(s) of particle accelerators. The second example concerns the discovery of the fact that neutrinos have a non-zero rest mass, by the SuperKamiokande collaboration (1998). This discovery inspired the development of the even larger water Cerenkov calorimeters discussed in Chapter 10. The third example concerns the discovery of the Higgs boson, by the ATLAS and CMS experiments at CERN’s Large Hadron Collider (2012). In all three cases, the role of the calorimeters, and their importance for the discoveries, is described in some detail.


Author(s):  
Chris Llewellyn Smith

This paper describes the scientific, technical and political genesis of the Large Hadron Collider (LHC). It begins with an outline of the early history of the LHC, from first thoughts and accelerator and detector developments that underwrote the project, through the first studies of the LHC and its scientific potential and the genesis of the experimental programme, to the presentation of the proposal to build the LHC to the CERN Council in December 1993. The events that led to the proposal to build the LHC in two stages, which was approved in December 1994, are then described. Next, the role of non-Member State contributions and of the agreement that CERN could take loans, which allowed single stage construction to be approved in December 1996, despite a cut in the Members' contributions, are explained. The paper concludes by identifying points of potential relevance for the approval of possible future large particle physics projects.


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