Precise determination of the properties of $X(3872)$ and of its isovector partner $W_{c1}$
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866908619368300544 |
|---|---|
| author | Ji, Teng Dong, Xiang-Kun Guo, Feng-Kun Hanhart, Christoph Meißner, Ulf-G. |
| author_facet | Ji, Teng Dong, Xiang-Kun Guo, Feng-Kun Hanhart, Christoph Meißner, Ulf-G. |
| contents | We perform a simultaneous fit to BESIII data on $e^+e^-\to γ(D^0{\bar{D}^{0}}π^0/J/ψπ^+π^-)$ and LHCb data on $B^+\to K^+(J/ψπ^+π^-)$ to precisely determine the properties of the $X(3872)$, with full consideration of three-body effects from $D^*\to Dπ$ decay, respecting both analyticity and unitarity. The $X(3872)$ is determined to be a quasi-bound state with a significance of $2.7\,σ$, representing the most precise determination to date. Its pole is located at $\left(-160^{+57}_{-74}-125^{+23}_{-38}\,i\right) \rm keV$, relative to the nominal $D^0\bar{D}^{*0}$ threshold. Moreover, we confirm the presence of an isovector partner state, $W_{c1}$. It is found as a virtual state at $\left(3.1\pm0.7+ 1.3^{+1.9}_{-0.6}\,i\right)\ \rm MeV$ relative to the $D^+ D^{*-}$ threshold on an unphysical Riemann sheet, strongly supporting a molecular nature of both $X(3872)$ and $W_{c1}$. As a highly nontrivial prediction we show that the $W_{c1}$ leads to nontrivial lineshapes around 3.88 GeV in $B^0\to K^0 X(3872)\to K^0 D^0\bar D^0π^0$ and $K^0J/ψπ^+π^-$ -- thus the scheme presented here can be tested further by improved measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_04458 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Precise determination of the properties of $X(3872)$ and of its isovector partner $W_{c1}$ Ji, Teng Dong, Xiang-Kun Guo, Feng-Kun Hanhart, Christoph Meißner, Ulf-G. High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice We perform a simultaneous fit to BESIII data on $e^+e^-\to γ(D^0{\bar{D}^{0}}π^0/J/ψπ^+π^-)$ and LHCb data on $B^+\to K^+(J/ψπ^+π^-)$ to precisely determine the properties of the $X(3872)$, with full consideration of three-body effects from $D^*\to Dπ$ decay, respecting both analyticity and unitarity. The $X(3872)$ is determined to be a quasi-bound state with a significance of $2.7\,σ$, representing the most precise determination to date. Its pole is located at $\left(-160^{+57}_{-74}-125^{+23}_{-38}\,i\right) \rm keV$, relative to the nominal $D^0\bar{D}^{*0}$ threshold. Moreover, we confirm the presence of an isovector partner state, $W_{c1}$. It is found as a virtual state at $\left(3.1\pm0.7+ 1.3^{+1.9}_{-0.6}\,i\right)\ \rm MeV$ relative to the $D^+ D^{*-}$ threshold on an unphysical Riemann sheet, strongly supporting a molecular nature of both $X(3872)$ and $W_{c1}$. As a highly nontrivial prediction we show that the $W_{c1}$ leads to nontrivial lineshapes around 3.88 GeV in $B^0\to K^0 X(3872)\to K^0 D^0\bar D^0π^0$ and $K^0J/ψπ^+π^-$ -- thus the scheme presented here can be tested further by improved measurements. |
| title | Precise determination of the properties of $X(3872)$ and of its isovector partner $W_{c1}$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2502.04458 |