X(16.7) Production in Electron-Position Collision

Chen, Long-Bin; Liang, Yi; Qiao, Cong-Feng

X(16.7) Production in Electron-Position Collision

Long-Bin Chen
(
- Beijing, GUCAS and
- CAS, Beijing
)
,
Yi Liang
(
- Beijing, GUCAS
)
,
Cong-Feng Qiao
(
- Beijing, GUCAS and
- CAS, Beijing
)

Jul 13, 2016

8 pages

e-Print:

1607.03970 [hep-ph]

View in:

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reference search24 citations

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Abstract: (arXiv)

The anomaly found in the excited

^8\text{Be}

nuclear transition to its ground state is attributed to a spin-1 gauge boson

X(16.7)

. To hunt for this boson, we propose two traps:

e^+e^-\to X\gamma

and

J/\psi\to X\gamma

, both following with

X\to e^+e^-

decay. We adopt the "vector minus axial-vector" interaction hypothesis. Analysis on the

X(16.7)

decay length, production rates, differential distribution with respect to the

e^+e^-

invariant-mass spectrum, and the signal-to-noise ratios (SNR) after the smearing at BESIII detector are discussed in detail. Given the coupling strength of

X

to vector/axial-vector currents

g_f^{v/a}\sim10^{-3}

at BESIII: (1) there would be about

6000

X

measurable events per year in electron-positron collision, yet with a large background after smearing, (2) while in

J/\psi

decays, we find that the axial-vector current may come into play, though merely 52 events may appear, the SNR are inspiring even after smearing.

Note:

18pages, 7 figures

electron positron: colliding beams
beryllium: excited nucleus
beryllium: decay
gauge boson: new particle
anomaly
interpretation of experiments
BaBar
BES
KLOE
numerical calculations

References(59)

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