Charm quark decays break charge-parity symmetry

AccessScience ◽  
2019 ◽  
Physics Today ◽  
2019 ◽  
Vol 72 (8) ◽  
pp. 14-16 ◽  
Author(s):  
Johanna L. Miller

2011 ◽  
Vol 84 (24) ◽  
Author(s):  
J. Ishioka ◽  
T. Fujii ◽  
K. Katono ◽  
K. Ichimura ◽  
T. Kurosawa ◽  
...  

2015 ◽  
Vol 23 (1) ◽  
pp. 45-56 ◽  
Author(s):  
Alban Kellerbauer

Almost ten years after the first production of cold antimatter at CERN, the confinement of antihydrogen has recently been achieved for the first time. Several experiments installed at the Antiproton Decelerator intend to test the symmetry between matter and antimatter by means of trapped anti-atoms. In addition, in the coming years it is planned to study the effect of gravity on antiparticles for the first time. Meanwhile, evidence from the Large Hadron Collider hinting at a violation of charge–parity symmetry beyond the Standard Model of particle physics has yet to be confirmed. A violation of the discrete symmetries that describe the relation between matter and antimatter could explain the excess of ordinary matter in the Universe.


2012 ◽  
Vol 86 (24) ◽  
Author(s):  
J. Ishioka ◽  
T. Fujii ◽  
K. Katono ◽  
K. Ichimura ◽  
T. Kurosawa ◽  
...  

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
Junpeng Hou ◽  
Zhitong Li ◽  
Qing Gu ◽  
Chuanwei Zhang

Author(s):  
Engel Roza

An analysis is presented of the possible existence of a second anomalous dipole moment of Dirac’s particle next to the angular one. It includes a discussion why, in spite of his own derivation, Dirac has denied its relevancy. It is shown why since then it has been overlooked and why it has vanished from leading textbooks. A critical survey is given on the reasons of its reject, including the failure of attempts to measure and the perceived violations of time reversal symmetry and charge-parity symmetry. Moreover, by reference from literature, the possible impact is discussed in the nuclear domain and in the gravitational domain.


Author(s):  
Lawrence H. Starkey

For two centuries Kant's first Critique has nourished various turns against transcendent metaphysics and realism. Kant was scandalized by reason's impotence in confronting infinity (or finitude) as seen in the divisibility of particles and in spatial extension and time. Therefore, he had to regard the latter as subjective and reality as imponderable. In what follows, I review various efforts to rationalize Kant's antinomies-efforts that could only flounder before the rise of Einstein's general relativity and Hawking's blackhole cosmology. Both have undercut the entire Kantian tradition by spawning highly probable theories for suppressing infinities and actually resolving these perplexities on a purely physical basis by positing curvatures of space and even of time that make them reëntrant to themselves. Heavily documented from primary sources in physics, this paper displays time’s curvature as its slowing down near very massive bodies and even freezing in a black hole from which it can reëmerge on the far side, where a new universe can open up. I argue that space curves into a double Möbius strip until it loses one dimension in exchange for another in the twin universe. It shows how 10-dimensional GUTs and the triple Universe, time/charge/parity conservation, and strange and bottom particle families and antiparticle universes, all fit together.


2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Joachim Brod ◽  
Emmanuel Stamou

Abstract Electric dipole moments are sensitive probes of new phases in the Higgs Yukawa couplings. We calculate the complete two-loop QCD anomalous dimension matrix for the mixing of CP-odd scalar and tensor operators and apply our results for a phenomenological study of CP violation in the bottom and charm Yukawa couplings. We find large shifts of the induced Wilson coefficients at next-to-leading-logarithmic order. Using the experimental bound on the electric dipole moments of the neutron and mercury, we update the constraints on CP-violating phases in the bottom and charm quark Yukawas.


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