English
Related papers

Related papers: $B(E2;2^{+}_{1}\rightarrow0^{+}_{1})$ anomaly in $…

200 papers

In certain neutron-rich Te isotopes, a decrease in the energy of the first excited 2+ state is accompanied by a decrease in the E2 strength to that state from the ground state, contradicting simple systematics and general intuition about…

Nuclear Theory · Physics 2009-11-07 J. Terasaki , J. Engel , W. Nazarewicz , M. Stoitsov

An update of B(E2) evaluation for even-even Cr, Fe, Ni and Zn nuclei has been presented. Current update is a continuation of S. Raman work on B(E2) values and was motivated by large numbers of new measurements. It extends the previous…

Nuclear Theory · Physics 2013-01-22 B. Pritychenko , J. Choquette , M. Horoi , B. Karamy , B. Singh

A brief review is given of $a_{\mu}=(g_{\mu}-2)/2$ as a probe of supersymmetry and of extra dimensions. It is known since the early to mid nineteen eightees that the supersymmetric electro-weak correction to $a_{\mu}$ can be as large or…

High Energy Physics - Phenomenology · Physics 2016-09-06 Pran Nath

This paper, together with a preceding paper, questions the so-called 'LSND anomaly': a 3.8 sigma excess of antielectronneutrino interactions over standard backgrounds, observed by the LSND Collaboration in a beam dump experiment with 800…

Using the $e^+e^-$ pair spectrometer at the 5 MV Van de Graaff accelerator at the Institute for Nuclear Research, Hungarian Academy of Sciences (ATOMKI), Krasznahorkay et al. have claimed a 6.8$\sigma$ excess at high $e^+e^-$ opening angles…

High Energy Physics - Phenomenology · Physics 2021-04-08 A. Aleksejevs , S. Barkanova , Yu. G. Kolomensky , B. Sheff

The anomalously large experimentally measured ratios of the semitauonic decay $B\rightarrow D^{(*)} +\tau+\nu$ and the corresponding semileptonic $B\rightarrow D^{*} +\l+\bar{\nu}_l$ disagree with the predictions of the standard E.W + QCD…

High Energy Physics - Phenomenology · Physics 2016-02-09 E. C. F. S. Fortes , Shmuel Nussinov

While the muon $g-2$ anomaly can be successfully explained by some new physics models, most of them are severely constrained by the $\mu \to e \gamma$ bound. This tension is more transparent from the effective field theory perspective, in…

High Energy Physics - Phenomenology · Physics 2015-01-20 Wei-Chi Chiu , Chao-Qiang Geng , Da Huang

We report a search for the rare decays $B^+ \to D^+ K^0$ and $B^+ \to D^+ K^{*0}$ in an event sample of approximately 465 million $B\bar B$ pairs collected with the BaBar detector at the PEP-II asymmetric-energy $e^+e^-$ collider at SLAC.…

High Energy Physics - Experiment · Physics 2010-12-23 The BABAR Collaboration , P. del Amo Sanchez

Background: The B(E2) transition strength to the 2+_2 state in 94Zr was initially reported to be larger by a factor of 1.63 than the one to the 2+_1 state from lifetime measurements with the Doppler-shift attenuation method (DSAM) using the…

New final results from the CMD-2 and SND e+e- annihilation experiments, together with radiative return measurements from BaBar, lead to recent improvements in the standard model prediction for the muon anomaly. The uncertainty at 0.48…

High Energy Physics - Experiment · Physics 2008-11-26 David W. Hertzog

At the present time, there are a number of measurements of $B$-decay observables that disagree with the predictions of the standard model. These discrepancies have been seen in processes governed by two types of decay: (i) $b \to s \mu^+…

High Energy Physics - Phenomenology · Physics 2019-11-15 David London

We report the observation of B0bar --> D0 eta' and the first observation of B0bar --> D*0 eta', using 140 fb-1 of data collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+ e- collider. We find the…

High Energy Physics - Experiment · Physics 2019-08-14 J. Schuemann

The very simple product of the number of particles by the number of holes appearing in the expression of the reduced B(E2: 0+1 -> 2+1) (B(E2)^) transition probability of even-even nuclei obtained from the extension of the seniority scheme…

Nuclear Theory · Physics 2007-05-23 Isabelle Deloncle , Brigitte Roussiere

Using all the available empirical information, we analyze the spacing distributions of low-lying 2-plus levels of even-even nuclei. To obtain statistically relevant samples, the nuclei are grouped into classes defined by the ratio R4/2 of…

Nuclear Theory · Physics 2015-06-26 A. Y. Abul-Magd , H. L. Harney , M. H. Simbel , H. A. Weidenmueller

A new result of investigations of the hyperfine structure (hfs) anomaly in Be isotopes is presented. The hfs constant for $^{11}$Be is obtained by using the core plus neutron type wave function: $ |2s_{1\over 2}>+|1d_{5\over2}\times 2^+ ;…

Nuclear Theory · Physics 2016-09-08 Takehisa Fujita , Kaori Ito , Toshio Suzuki

This paper is a summary of my talk at SPIE2013. The organizers were kind enough to invite me to talk about anything I wanted, and I chose to bring up the notion of higher order complementarity and the fact that it may not be monotonic. I…

Quantum Physics · Physics 2018-02-20 Ron Folman

Recent experimental results from the Atomki collaboration have reported the observation of anomalous effects in Beryllium, Helium and Carbon nuclear transitions that could hint at physics beyond the Standard Model. However, the MEG-II…

High Energy Physics - Phenomenology · Physics 2025-04-07 Daniele Barducci , Davide Germani , Marco Nardecchia , Stefano Scacco , Claudio Toni

Osmium, the least compressible metal, has recently been observed to undergo abrupt changes in the c/a ratio at extreme pressures. These are claimed to provide evidence for two unusual electronic behaviors: a crossing of the semicore 4f and…

Materials Science · Physics 2022-08-09 Gavin Armstrong Woolman , Graeme J. Ackland

We propose an extension of the standard model with an extra U(1)' abelian symmetry, three Higgs doublets and one Higgs singlet, where the new U(1)' charges are flavour non-universal. As a result, the model introduces an enlarger particle…

High Energy Physics - Phenomenology · Physics 2018-08-29 R. Martinez , F. Ochoa , J. M. Quimbayo

We estimate the values of Yukawa couplings of a light pseudoscalar A with a mass of about 17 MeV, which would explain the $^8Be$ anomaly observed in the Atomki pair spectrometer experiment. The resulting couplings of A to up and down type…

High Energy Physics - Phenomenology · Physics 2016-10-31 Ulrich Ellwanger , Stefano Moretti