Evidence of a New Excited Charmed Baryon Decaying to Σc (2455)0,+ + π+-
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476466" target="_blank" >RIV/00216208:11320/23:10476466 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xUebfBJSJF" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xUebfBJSJF</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.130.031901" target="_blank" >10.1103/PhysRevLett.130.031901</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Evidence of a New Excited Charmed Baryon Decaying to Σc (2455)0,+ + π+-
Popis výsledku v původním jazyce
We present the study of (B) over bar (0) -> Sigma(c)(2455)(0, + +) pi(+/-)(p) over bar decays based on 772 x 10(6) B (B) over bar events collected with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. The Sigma(c)(2455)(0, + +) candidates are reconstructed via their decay to Lambda(+)(c)x(-/+) and Lambda(+)(c) decays to pK(-)pi(+), pK(S)(0), and Lambda pi(+) final states. The corresponding branching fractions are measured to be B((B) over bar (0) -> Sigma(c)(2455)(0)pi(+)(p) over bar) = (1.09 +/- 0.06 +/- 0.07) x 10(-4) and B((B) over bar (0) -> Sigma(c)(2455)(+ +)pi(-)(p) over bar) = (1.84 +/- 0.11 +/- 0.12) x 10(-4), which are consistent with the world average values with improved precision. A new structure is found in the M-Sigma c(2455)0,M- + + pi +/- spectrum with a significance of 4.2 sigma including systematic uncertainty. The structure is possibly an excited Lambda(+)(c) and is tentatively named Lambda(c)(2910)(+). Its mass and width are measured to be (2913.8 +/- 5.6 +/- 3.8) MeV/c(2) and (51.8 +/- 20.0 +/- 18.8) MeV, respectively. The products of branching fractions for the Lambda(c)(2910)(+) are measured to be B((B) over bar (0) -> Lambda(c)(2910)(+)(p) over bar) x B(Lambda(c)(2910)(+) -> Sigma(c)(2455)(0)pi(+)) = (9.5 +/- 3.6 +/- 1.6) x 10(-6) and B((B) over bar (0) -> Lambda(c)(2910)(+)(p) over bar) x B(Lambda(c)(2910)(+) -> Sigma(c)(2455)(+ +)pi(-)) = (1.24 +/- 0.35 +/- 0.10) x 10(-5). Here, the first and second uncertainties are statistical and systematic, respectively.
Název v anglickém jazyce
Evidence of a New Excited Charmed Baryon Decaying to Σc (2455)0,+ + π+-
Popis výsledku anglicky
We present the study of (B) over bar (0) -> Sigma(c)(2455)(0, + +) pi(+/-)(p) over bar decays based on 772 x 10(6) B (B) over bar events collected with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. The Sigma(c)(2455)(0, + +) candidates are reconstructed via their decay to Lambda(+)(c)x(-/+) and Lambda(+)(c) decays to pK(-)pi(+), pK(S)(0), and Lambda pi(+) final states. The corresponding branching fractions are measured to be B((B) over bar (0) -> Sigma(c)(2455)(0)pi(+)(p) over bar) = (1.09 +/- 0.06 +/- 0.07) x 10(-4) and B((B) over bar (0) -> Sigma(c)(2455)(+ +)pi(-)(p) over bar) = (1.84 +/- 0.11 +/- 0.12) x 10(-4), which are consistent with the world average values with improved precision. A new structure is found in the M-Sigma c(2455)0,M- + + pi +/- spectrum with a significance of 4.2 sigma including systematic uncertainty. The structure is possibly an excited Lambda(+)(c) and is tentatively named Lambda(c)(2910)(+). Its mass and width are measured to be (2913.8 +/- 5.6 +/- 3.8) MeV/c(2) and (51.8 +/- 20.0 +/- 18.8) MeV, respectively. The products of branching fractions for the Lambda(c)(2910)(+) are measured to be B((B) over bar (0) -> Lambda(c)(2910)(+)(p) over bar) x B(Lambda(c)(2910)(+) -> Sigma(c)(2455)(0)pi(+)) = (9.5 +/- 3.6 +/- 1.6) x 10(-6) and B((B) over bar (0) -> Lambda(c)(2910)(+)(p) over bar) x B(Lambda(c)(2910)(+) -> Sigma(c)(2455)(+ +)pi(-)) = (1.24 +/- 0.35 +/- 0.10) x 10(-5). Here, the first and second uncertainties are statistical and systematic, respectively.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10300 - Physical sciences
Návaznosti výsledku
Projekt
<a href="/cs/project/GA22-18469S" target="_blank" >GA22-18469S: Studium jevů za Standardním modelem ve flavor sektoru na experimentu Belle II</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Physical Review Letters
ISSN
0031-9007
e-ISSN
1079-7114
Svazek periodika
130
Číslo periodika v rámci svazku
3
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
7
Strana od-do
031901
Kód UT WoS článku
000939267000007
EID výsledku v databázi Scopus
2-s2.0-85147197020