Search for Pc(c)over-bars (4459)0 and Pc(c)over-bars (4338)0 in Υ(1S, 2S) Inclusive Decays at Belle
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510176" target="_blank" >RIV/00216208:11320/25:10510176 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lWGlH0-ejF" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lWGlH0-ejF</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/pf8m-6j69" target="_blank" >10.1103/pf8m-6j69</a>
Alternative languages
Result language
angličtina
Original language name
Search for Pc(c)over-bars (4459)0 and Pc(c)over-bars (4338)0 in Υ(1S, 2S) Inclusive Decays at Belle
Original language description
Using data samples of 102 million Upsilon(1S) events and 158 million Upsilon(2S) events collected by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider, we search for [udsc (c) over bar] pentaquark states decaying to J/psi Lambda.. Using the first observations of Upsilon(1S, 2S) inclusive decays to J/psi Lambda we find evidence of the P-c (c) over bars(4459)(0) state with a local significance of 3.3 standard deviations, including statistical and systematic uncertainties. We measure the mass and width of the P-c (c) over bars(4459)(0) to be (4471.7 +/- 4.8 +/- 0.6) MeV/c(2) and (2 2 +/- 13 +/- 3) MeV, respectively. The branching fractions for P-c (c) over bars (4459)(0) production are measured to be B[Upsilon(1S) -> P-c (c) over bars(4459)(0)/(P) over bar (c (c) over bars)(4459)(0) + anything] = (3.5 +/- 2.0 +/- 0.2) x 10(-6) and B[Upsilon(2S) -> P-c (c) over bars (4459)(0)/ (P) over bar (c (c) over bars)(4459)(0) + anything] = (2.9 +/- 1.7 +/- 0.4) x 10(-6). The inclusive branching fractions of Upsilon(1S, 2S) -> J/psi Lambda/(Lambda) over bar are measured to be B[Upsilon(1S) -> J/psi Lambda/(Lambda) over bar + anything] = (36.9 +/- 5.3 +/- 2.4) x 10(-6) and B[Upsilon(2S) -> J/psi Lambda/(Lambda) over bar + anything] = (22.3 +/- 5.7 +/- 3.1) x 10(-6). We measure the visible cross section sigma(e(+)e(-) -> J psi Lambda/(Lambda) over bar + anything) = (90 +/- 14 +/- 6) fb for the continuum production at root s = 10.52 GeV. In all cases, the first uncertainties are statistical and the second are systematic.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10300 - Physical sciences
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Letters
ISSN
0031-9007
e-ISSN
1079-7114
Volume of the periodical
135
Issue of the periodical within the volume
04
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
041901
UT code for WoS article
001552756300001
EID of the result in the Scopus database
2-s2.0-105013416663