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16–21 Aug 2019
Guilin Bravo Hotel, Guilin, China
Asia/Shanghai timezone

Studies of the ISR process e+e- -> pi+pi-pi0gamma at the phi mass with the KLOE detector

Not scheduled
15m
Guilin Bravo Hotel, Guilin, China

Guilin Bravo Hotel, Guilin, China

14 South Ronghu Road, Xiangshan, Guilin 541002, Guangxi, China
Poster Posters

Speaker

Dr Xiaolin Kang (INFN-LNF)

Description

Experimental measured value of the muon magnetic moment $a_{\mu} = \frac{g_{\mu}-2}{2}$ has a long-standing and well known discrepancy comparing with Standard Model prediction that has been narrowed down within a range $3.2-3.6\,\sigma$ after years of efforts made by experimentalists and theoreticians. Previous results of dipion cross section $\sigma_{\pi\pi} = \sigma(e^+e^-\to\pi^+\pi^-)$ from KLOE have provided comprehensive and substantial studies on the largest experimental input from hadronic contribution. In order to deepen the understand of theoretical uncertainty for $a_{\mu}$, it is natural to extent the studies to three pion cross section, which is the second largest hardronic contribution to $a_{\mu}$. The initial state radiation (ISR) process $e^{+}e^{-}\to3\pi$ has been studied at a center-of-mass energy $\sqrt{s}\approx1.019$ GeV close to the $\phi$ resonance using a $1.7~{\rm fb}^{-1}$ data sample collected with KLOE detector at the DA$\Phi$NE year 2004/2005. In this analysis, we have studied the visible section $\sigma^{\rm vis}_{3\pi}$ of process $e^{+}e^{-}\to\pi^{+}\pi^{-}\pi^{0}$ for the effective center-of-mass energy $\sqrt{s'}$ corresponds to omega mass range $M_{3\pi}\in[720, 900]$ ${\rm MeV}/c^{2}$. With the same dataset, a further study of $\mathcal{C}$-violating decay $e^{+}e^{-}\to\phi\to\omega\gamma$ is being performed based on a careful investigation of the ISR process, which is the major background with identical $3\pi$ final state.

Primary author

Dr Xiaolin Kang (INFN-LNF)

Presentation materials

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