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Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV

Publication ,  Journal Article
Adamczyk, L; Agakishiev, G; Aggarwal, MM; Ahammed, Z; Alakhverdyants, AV; Alekseev, I; Alford, J; Anderson, BD; Anson, CD; Arkhipkin, D; Cui, X ...
Published in: Physical Review C - Nuclear Physics
August 8, 2012
Published version (DOI)

We report on the mid-rapidity mass spectrum of di-electrons and cross sections of pseudoscalar and vector mesons via e+e- decays, from √s=200 GeV p+p collisions, measured by the large-acceptance experiment STAR at the Relativistic Heavy Ion Collider. The ratio of the di-electron continuum to the combinatorial background is larger than 10% over the entire mass range. Simulations of di-electrons from light-meson decays and heavy-flavor decays (charmonium and open charm correlation) are found to describe the data. The extracted ω→e+e- invariant yields are consistent with previous measurements. The mid-rapidity yields (dN/dy) of φ and J/ψ are extracted through their di-electron decay channels and are consistent with the previous measurements of φ→K+K- and J/ψ→e+e -. Our results suggest a new upper limit of the branching ratio of the η→e+e- of 1.7×10-5 at the 90% confidence level. © 2012 American Physical Society.

Duke Scholars

Anselm G. Vossen
Author Anselm G. Vossen Physics

Published In

Physical Review C - Nuclear Physics

DOI

10.1103/PhysRevC.86.024906

EISSN

1089-490X

ISSN

0556-2813

Publication Date

August 8, 2012

Volume

86

Issue

2

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

Citation

APA
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MLA
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Adamczyk, L., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alakhverdyants, A. V., Alekseev, I., … Haag, B. (2012). Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV. Physical Review C - Nuclear Physics, 86(2). https://doi.org/10.1103/PhysRevC.86.024906
Adamczyk, L., G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, et al. “Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV.” Physical Review C - Nuclear Physics 86, no. 2 (August 8, 2012). https://doi.org/10.1103/PhysRevC.86.024906.
Adamczyk L, Agakishiev G, Aggarwal MM, Ahammed Z, Alakhverdyants AV, Alekseev I, et al. Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV. Physical Review C - Nuclear Physics. 2012 Aug 8;86(2).
Adamczyk, L., et al. “Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV.” Physical Review C - Nuclear Physics, vol. 86, no. 2, Aug. 2012. Scopus, doi:10.1103/PhysRevC.86.024906.
Adamczyk L, Agakishiev G, Aggarwal MM, Ahammed Z, Alakhverdyants AV, Alekseev I, Alford J, Anderson BD, Anson CD, Arkhipkin D, Aschenauer E, Averichev GS, Balewski J, Banerjee A, Barnovska Z, Beavis DR, Bellwied R, Betancourt MJ, Betts RR, Bhasin A, Bhati AK, Bichsel H, Bielcik J, Bielcikova J, Bland LC, Bordyuzhin IG, Borowski W, Bouchet J, Brandin AV, Brovko SG, Bruna E, Bueltmann S, Bunzarov I, Burton TP, Butterworth J, Cai XZ, Caines H, Calderón De La Barca Sánchez M, Cebra D, Cendejas R, Cervantes MC, Chaloupka P, Chang Z, Chattopadhyay S, Chen HF, Chen JH, Chen JY, Chen L, Cheng J, Cherney M, Chikanian A, Christie W, Chung P, Chwastowski J, Codrington MJM, Corliss R, Cramer JG, Crawford HJ, Cui X, Davila Leyva A, De Silva LC, Debbe RR, Dedovich TG, Deng J, Derradi De Souza R, Dhamija S, Didenko L, Ding F, Dion A, Djawotho P, Dong X, Drachenberg JL, Draper JE, Du CM, Dunkelberger LE, Dunlop JC, Efimov LG, Elnimr M, Engelage J, Eppley G, Eun L, Evdokimov O, Fatemi R, Fazio S, Fedorisin J, Fersch RG, Filip P, Finch E, Fisyak Y, Gagliardi CA, Gangadharan DR, Geurts F, Gibson A, Gliske S, Gorbunov YN, Grebenyuk OG, Grosnick D, Gupta S, Guryn W, Haag B. Di-electron spectrum at mid-rapidity in p+p collisions at √s=200 GeV. Physical Review C - Nuclear Physics. 2012 Aug 8;86(2).

Published In

Physical Review C - Nuclear Physics

DOI

10.1103/PhysRevC.86.024906

EISSN

1089-490X

ISSN

0556-2813

Publication Date

August 8, 2012

Volume

86

Issue

2

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics