Measurements of B -> J/psi at forward rapidity in p plus p collisions at root s=510 GeV

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Pysyväisosoite

http://hdl.handle.net/10138/310138

Lähdeviite

Aidala , C , Kim , D J , Krizek , F , Novitzky , N , Rak , J & PHENIX Collaboration 2017 , ' Measurements of B - > J/psi at forward rapidity in p plus p collisions at root s=510 GeV ' , Physical Review D , vol. 95 , no. 9 , 092002 . https://doi.org/10.1103/PhysRevD.95.092002

Julkaisun nimi: Measurements of B -> J/psi at forward rapidity in p plus p collisions at root s=510 GeV
Tekijä: Aidala, C.; Kim, D. J.; Krizek, F.; Novitzky, N.; Rak, J.; PHENIX Collaboration
Tekijän organisaatio: Helsinki Institute of Physics
Päiväys: 2017-05-02
Kieli: eng
Sivumäärä: 18
Kuuluu julkaisusarjaan: Physical Review D
ISSN: 2470-0010
DOI-tunniste: https://doi.org/10.1103/PhysRevD.95.092002
URI: http://hdl.handle.net/10138/310138
Tiivistelmä: We report the first measurement of the fraction of J/psi mesons coming from B-meson decay (F (B -> J/psi)) in p + p collisions at root s = 510 GeV. The measurement is performed using the forward silicon vertex detector and central vertex detector at PHENIX, which provide precise tracking and distance-of-closest-approach determinations, enabling the statistical separation of J=. due to B-meson decays from prompt J/psi. The measured value of F (B -> J/psi) is 8.1% +/- 2.3% (stat) +/- 1.9% (syst) for J/psi with transverse momenta 0 <p(T) <5 GeV/c and rapidity 1.2 <vertical bar y vertical bar <2.2. The measured fraction F (B -> J/psi) at PHENIX is compared to values measured by other experiments at higher center of mass energies and to fixed-order-next-toleading- logarithm and color-evaporation-model predictions. The b (b) over bar cross section per unit rapidity [d sigma/dy(pp -> b (b) over bar)] extracted from the obtained F (B -> J/psi) and the PHENIX inclusive J/psi cross section measured at 200 GeV scaled with color-evaporation-model calculations, at the mean B hadron rapidity y = +/- 1.7 in 510 GeV p + p collisions, is 3.63(-1.70)(+1.92) mu b. It is consistent with the fixed-order-next-toleading- logarithm calculations.
Avainsanat: P(P)OVER-BAR COLLISIONS
TEV
PHENIX
COLLIDER
DETECTOR
PROMPT
114 Physical sciences
Vertaisarvioitu: Kyllä
Tekijänoikeustiedot: unspecified
Pääsyrajoitteet: openAccess
Rinnakkaistallennettu versio: publishedVersion


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