Search For Dark Photons From Neutral Meson Decays In Math Mi P Mi Mo Mo Mi P Mi Math And Math Mi D Mi Mo Mo Mi Mathvariant
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Search For Dark Photons From Neutral Meson Decays In Math Mi P Mi Mo Mo Mi P Mi Math And Math Mi D Mi Mo Mo Mi Mathvariant
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Author :
language : en
Publisher:
Release Date : 2015
Search For Dark Photons From Neutral Meson Decays In Math Mi P Mi Mo Mo Mi P Mi Math And Math Mi D Mi Mo Mo Mi Mathvariant written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The standard model (SM) of particle physics is spectacularly successful, yet the measured value of the muon anomalous magnetic moment (g-2)[mu] deviates from SM calculations by 3.6[sigma]. Several theoretical models attribute this to the existence of a "dark photon," an additional U(1) gauge boson, which is weakly coupled to ordinary photons. For this study, the PHENIX experiment at the Relativistic Heavy Ion Collider has searched for a dark photon, U, in [pi]0, [eta]2!gamma]e+e- decays and obtained upper limits of [theta](2×10-6) on U-[gamma] mixing at 90% C.L. for the mass range 30
Search For Dark Photons From Neutral Meson Decays In P P And D Au Collisions At Snn
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Author :
language : en
Publisher:
Release Date : 2015
Search For Dark Photons From Neutral Meson Decays In P P And D Au Collisions At Snn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The standard model (SM) of particle physics is spectacularly successful, yet the measured value of the muon anomalous magnetic moment (g-2)? deviates from SM calculations by 3.6?. Several theoretical models attribute this to the existence of a ?dark photon,? an additional U(1) gauge boson, which is weakly coupled to ordinary photons. For this study, the PHENIX experiment at the Relativistic Heavy Ion Collider has searched for a dark photon, U, in ?0,?????????e+e- decays and obtained upper limits of ?(2×10-6) on U-? mixing at 90% C.L. for the mass range 30msubU/sub90 MeV/csup2/sup. Lastly, combined with other experimental limits, the remaining region in the U-? mixing parameter space that can explain the (g-2)sub?/sub deviation from its SM value is nearly completely excluded at the 90% confidence level, with only a small region of 29msubU
Math Mi Beta Mi Math Decay Of Math Mmultiscripts Mi Mathvariant
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Author :
language : en
Publisher:
Release Date : 2015
Math Mi Beta Mi Math Decay Of Math Mmultiscripts Mi Mathvariant written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Here, the rare [beta]-decay channel of 6He into the [alpha]+d continuum was investigated at the REX-ISOLDE facility. Bunches of postaccelerated 6He ions were implanted into the optical time projection chamber (OTPC), where the decays with emission of charged particles were recorded. This novel technique allowed us to extend the low-energy end of the spectrum down to 150 keV in [alpha]+d center of mass, corresponding to a deuteron energy of 100 keV. The branching ratio for this process amounts to [2.78±0.07(stat)±0.17(sys)]×10-6. The shape of the spectrum is found to be in a good agreement with a three-body model, while the total intensity is about 20% larger than the predicted one.
The Physics Of The Dark Photon
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Author : Marco Fabbrichesi
language : en
Publisher: Springer Nature
Release Date : 2020-11-23
The Physics Of The Dark Photon written by Marco Fabbrichesi and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-11-23 with Science categories.
This book is about the dark photon which is a new gauge boson whose existence has been conjectured. Due to its interaction with the ordinary, visible photon, such a particle can be experimentally detected via specific signatures. In this book, the authors review the physics of the dark photon from the theoretical and experimental point of view. They discuss the difference between the massive and the massless case, highlighting how the two phenomena arise from the same vector portal between the dark and the visible sector. A review of the cosmological and astrophysical observations is provided, together with the connection to dark matter physics. Then, a perspective on current and future experimental limits on the parameters of the massless and massive dark photon is given, as well as the related bounds on milli-charged fermions. The book is intended for graduate students and young researchers who are embarking on dark photon research, and offers them a clear and up-to-date introduction to the subject.
B Meson Decays To Mega K Omega Rho Omega Omega Omega Phi And Omega F0
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Author : J. C. Chen
language : en
Publisher:
Release Date : 2006
B Meson Decays To Mega K Omega Rho Omega Omega Omega Phi And Omega F0 written by J. C. Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
The authors describe searches for B meson decays to the charmless vector-vector final states {omega}K*, {omega}p, {omega}{omega}, and {omega}{phi} with 233 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation at {radical}s = 10.58 GeV. They also search for the vector-scalar B decay to {omega}f{sub 0}.