Observation of the doubly Cabibbo-suppressed decay Ξ c +  → pϕ

Robert Appleby; Silvia Borghi; Christopher Burr; Stefano De Capua; Deepanwita Dutta; Evelina Gersabeck; Marco Gersabeck; Lucia Grillo; Martha Hilton; George Lafferty; Andrew Mcnab; Christopher Parkes; Gediminas Sarpis; Mark Williams; The LHCb Collaboration

doi:10.1007/JHEP04(2019)084

Observation of the doubly Cabibbo-suppressed decay Ξ c + → pϕ

Robert Appleby, Silvia Borghi, Christopher Burr, Stefano De Capua, Deepanwita Dutta, Evelina Gersabeck, Marco Gersabeck, Lucia Grillo, Martha Hilton, George Lafferty, Andrew Mcnab, Christopher Parkes, Gediminas Sarpis, Mark Williams, The LHCb Collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

The doubly Cabibbo-suppressed decay Ξ c + → pϕ with ϕ → K+K− is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb−1 recorded with the LHCb detector in pp collisions at a centre-of-mass energy of 8 TeV. The ratio of branching fractions between the decay Ξ c + → pϕ and the singly Cabibbo-suppressed decay Ξ c + → pK−π+ is measured to beB(Ξ+c→pϕ)B(Ξ+c→pK−π+)=(19.8±0.7±0.9±0.2)×10−3,B(Ξc+→pϕ)B(Ξc+→pK−π+)=(19.8±0.7±0.9±0.2)×10−3,where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the ϕ → K+K− branching fraction.

Original language	English
Journal	The Journal of High Energy Physics
Volume	2019
Issue number	84
Early online date	10 Apr 2019
DOIs	https://doi.org/10.1007/JHEP04(2019)084
Publication status	Published - Apr 2019

Access to Document

10.1007/JHEP04(2019)084Licence: CC BY

Cite this

@article{1fe3325d18c844999dff206ab315e0e2,

title = "Observation of the doubly Cabibbo-suppressed decay Ξ c + → pϕ",

abstract = "The doubly Cabibbo-suppressed decay Ξ c + → pϕ with ϕ → K+K− is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb−1 recorded with the LHCb detector in pp collisions at a centre-of-mass energy of 8 TeV. The ratio of branching fractions between the decay Ξ c + → pϕ and the singly Cabibbo-suppressed decay Ξ c + → pK−π+ is measured to beB(Ξ+c→pϕ)B(Ξ+c→pK−π+)=(19.8±0.7±0.9±0.2)×10−3,B(Ξc+→pϕ)B(Ξc+→pK−π+)=(19.8±0.7±0.9±0.2)×10−3,where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the ϕ → K+K− branching fraction.",

author = "Robert Appleby and Silvia Borghi and Christopher Burr and {De Capua}, Stefano and Deepanwita Dutta and Evelina Gersabeck and Marco Gersabeck and Lucia Grillo and Martha Hilton and George Lafferty and Andrew Mcnab and Christopher Parkes and Gediminas Sarpis and Mark Williams and {The LHCb Collaboration}",

year = "2019",

month = apr,

doi = "10.1007/JHEP04(2019)084",

language = "English",

volume = "2019",

journal = "The Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Nature",

number = "84",

}

TY - JOUR

T1 - Observation of the doubly Cabibbo-suppressed decay Ξ c + → pϕ

AU - Appleby, Robert

AU - Borghi, Silvia

AU - Burr, Christopher

AU - De Capua, Stefano

AU - Dutta, Deepanwita

AU - Gersabeck, Evelina

AU - Gersabeck, Marco

AU - Grillo, Lucia

AU - Hilton, Martha

AU - Lafferty, George

AU - Mcnab, Andrew

AU - Parkes, Christopher

AU - Sarpis, Gediminas

AU - Williams, Mark

AU - The LHCb Collaboration,

PY - 2019/4

Y1 - 2019/4

N2 - The doubly Cabibbo-suppressed decay Ξ c + → pϕ with ϕ → K+K− is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb−1 recorded with the LHCb detector in pp collisions at a centre-of-mass energy of 8 TeV. The ratio of branching fractions between the decay Ξ c + → pϕ and the singly Cabibbo-suppressed decay Ξ c + → pK−π+ is measured to beB(Ξ+c→pϕ)B(Ξ+c→pK−π+)=(19.8±0.7±0.9±0.2)×10−3,B(Ξc+→pϕ)B(Ξc+→pK−π+)=(19.8±0.7±0.9±0.2)×10−3,where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the ϕ → K+K− branching fraction.

AB - The doubly Cabibbo-suppressed decay Ξ c + → pϕ with ϕ → K+K− is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb−1 recorded with the LHCb detector in pp collisions at a centre-of-mass energy of 8 TeV. The ratio of branching fractions between the decay Ξ c + → pϕ and the singly Cabibbo-suppressed decay Ξ c + → pK−π+ is measured to beB(Ξ+c→pϕ)B(Ξ+c→pK−π+)=(19.8±0.7±0.9±0.2)×10−3,B(Ξc+→pϕ)B(Ξc+→pK−π+)=(19.8±0.7±0.9±0.2)×10−3,where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the ϕ → K+K− branching fraction.

U2 - 10.1007/JHEP04(2019)084

DO - 10.1007/JHEP04(2019)084

M3 - Article

SN - 1126-6708

VL - 2019

JO - The Journal of High Energy Physics

JF - The Journal of High Energy Physics

IS - 84

ER -

Observation of the doubly Cabibbo-suppressed decay Ξ c + → pϕ

Abstract

Access to Document

Fingerprint

Cite this