Search for exotic decay modes of the ϒ(1S)

1986 ◽  
Vol 179 (4) ◽  
pp. 403-408 ◽  
Author(s):  
H. Albrecht ◽  
U. Binder ◽  
P. Böckmann ◽  
R. Gläser ◽  
G. Harder ◽  
...  
Keyword(s):  
Decay Modes ◽  
Exotic Decay

scholarly journals Exotic Decay Modes in Rotating Nuclei

2005 ◽  
Vol 752 ◽  
pp. 241-250 ◽  
Author(s):  
D. Rudolph ◽  
E.K. Johansson ◽  
L.-L. Andersson ◽  
J. Ekman ◽  
C. Fahlander ◽  
...  
Keyword(s):  
Decay Modes ◽  
Exotic Decay ◽  
Rotating Nuclei

scholarly journals Probing exotic charged Higgs decays in the Type-II 2HDM through top rich signal at a future 100 TeV pp collider

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Shuailong Li ◽  
Huayang Song ◽  
Shufang Su
Keyword(s):  
Higgs Doublet ◽  
Higgs Bosons ◽  
Final States ◽  
Type Ii ◽  
Decision Tree Classifier ◽  
Decay Channels ◽  
Decay Modes ◽  
Exotic Decay ◽  
Tree Classifier ◽  
Boosted Decision Tree

Abstract The exotic decay modes of non-Standard Model Higgs bosons are efficient in probing the hierarchical Two Higgs Doublet Models (2HDM). In particular, the decay mode H±→HW± serves as a powerful channel in searching for charged Higgses. In this paper, we analyze the reach for H±→HW±→$$ t\overline{t}W $$ t t ¯ W at a 100 TeV pp collider, and show that it extends the reach of the previously studied ττW final states once above the top threshold. Top tagging technique is used, in combination with a boosted decision tree classifier. At the low tan β region, almost the entire hierarchical Type-II 2HDM parameter space can be probed via the combination of all exotic decay channels.

scholarly journals ISOMER BEAMS

2006 ◽  
Vol 15 (07) ◽  
pp. 1637-1644 ◽  
Author(s):  
P. M. WALKER
Keyword(s):  
Angular Momentum ◽  
Excitation Energy ◽  
Nuclear Structure ◽  
Coulomb Excitation ◽  
Decay Rates ◽  
Radioactive Beams ◽  
Decay Modes ◽  
Charge Radii ◽  
Exotic Decay ◽  
Structure Investigations

As a subset of radioactive beams, isomer beams open up the dimensions of excitation energy and angular momentum. The problem of isomer decay rates is briefly presented, as they are not yet well understood. The use of isomer beams for nuclear structure investigations is reviewed, using examples related to exotic decay modes, charge radii, and Coulomb excitation. There are also unique possibilities for the study of induced electromagnetic depopulation. A key aspect is beam purification, for which different techniques are discussed.

scholarly journals Cluster radioactivity in superheavy nuclei 299-306122

2020 ◽  
Vol 8 (1) ◽  
pp. 55-63
Author(s):  
H. C. Manjunatha ◽  
S. Alfred Cecil Raj ◽  
A. M. Nagaraja ◽  
N. Sowmya
Keyword(s):  
Spontaneous Fission ◽  
Alpha Decay ◽  
Cluster Decay ◽  
Superheavy Nuclei ◽  
Decay Modes ◽  
Cluster Radioactivity ◽  
Exotic Decay

Cluster radioactivity is an intermediate between alpha decay and spontaneous fission. It is also an exotic decay obtained in superheavy nuclei. When a cluster decay is detected in superheavy nuclei, the daughter nuclei is having near or equal to doubly magic nuclei. We have investigated cluster decay of isotopes of He, Li, Be, Ne, N, Mg, Si, P, S, Cl, Ar and Ca in the superhaevy nuclei region 299-306122. We have also compared the logarithmic half-lives of cluster decay with that of other models such as Univ [1], NRDX [2], UDL [3] and Horoi [4]. From this study it is concluded that  cluster decay of 4He, 22Ne, 26Mg, 28Si 30Si, 34S, 40Ca and 46Ca are having shorter logarithmic half-lives compared to exotic cluster decay modes.

Experimental upper limits on branching fractions for unexpected decay modes of theτlepton

1982 ◽  
Vol 25 (11) ◽  
pp. 2869-2886 ◽  
Author(s):  
K. G. Hayes ◽  
M. L. Perl ◽  
M. S. Alam ◽  
A. M. Boyarski ◽  
M. Breidenbach ◽  
...  
Keyword(s):  
Branching Fractions ◽  
Decay Modes ◽  
Upper Limits

scholarly journals An event excess observed in the deeply bound region of the 12C (K−, p) missing-mass spectrum

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Yudai Ichikawa ◽  
Junko Yamagata-Sekihara ◽  
Jung Keun Ahn ◽  
Yuya Akazawa ◽  
Kanae Aoki ◽  
...  
Keyword(s):  
Mass Spectrum ◽  
Binding Energy ◽  
Decay Channel ◽  
Peak Shift ◽  
Bound State ◽  
Elastic Peak ◽  
Missing Mass ◽  
Decay Modes ◽  
Kaon Momentum ◽  
First Time

Abstract We have measured, for the first time, the inclusive missing-mass spectrum of the $^{12}$C$(K^-, p)$ reaction at an incident kaon momentum of 1.8 GeV/$c$ at the J-PARC K1.8 beamline. We observed a prominent quasi-elastic peak ($K^-p \rightarrow K^-p$) in this spectrum. In the quasi-elastic peak region, the effect of secondary interaction is apparently observed as a peak shift, and the peak exhibits a tail in the bound region. We compared the spectrum with a theoretical calculation based on the Green’s function method by assuming different values of the parameters for the $\bar{K}$–nucleus optical potential. We found that the spectrum shape in the binding-energy region $-300 \, \text{MeV} < B_{K} < 40$ MeV is best reproduced with the potential depths $V_0 = -80$ MeV (real part) and $W_0 = -40$ MeV (imaginary part). On the other hand, we observed a significant event excess in the deeply bound region around $B_{K} \sim 100$ MeV, where the major decay channel of $K^- NN \to \pi\Sigma N$ is energetically closed, and the non-mesonic decay modes ($K^- NN \to \Lambda N$ and $\Sigma N$) should mainly contribute. The enhancement is fitted well by a Breit–Wigner function with a kaon-binding energy of 90 MeV and width 100 MeV. A possible interpretation is a deeply bound state of a $Y^{*}$-nucleus system.

Sign in / Sign up

Export Citation Format

Share Document