PHENIX Muon Arms

Akikawa, H.; Al-Jamel, A.; Archuleta, J.B.; Arméndariz, R.; Armijo, V.; Awes, T. C.; Baldisseri, A.; Barker, Alan; Barnes, P. D.; Bassalleck, B.; Batsouli, S.; Behrendt, Jörg; Bellaiche, F.; Bland, A; Bobrek, M.; Boissevain, J. G.; Borel, H.; Brooks, M. L.; Brown, A. W. A.; Brown, D. S.; Bruner, N.; Cafferty, M.M.; Carey, T. A.; Chai, J. S.; Chavez, L. L.; Chollet, S.; Choudhury, R. K.; Chung, M.; Cianciolo, V.; Clark, Deborah J.; Cobigo, Y.; Dabrowski, C.M.; Debraine, A.; DeMoss, J.; Dinesh, B. V.; Drachenberg, J. L.; Drapier, O.; Echave, M.A.; Efremenko, Y.; En’yo, H.; Fields, D. E.; Fleuret, F.; Fried, J.; Fujisawa, E.; Funahashi, H.; Gadrat, S.; Gastaldi, F.; Gee, Timothy F.; Glenn, A.; Gogiberidze, G.; Gonin, M.; Gösset, J.; Goto, Y.; Cassagnac, R. Granier de; Hance, R.; Hart, Greg; Hayashi, Naoki; Held, S.; Hicks, J.S.; Hill, J. C.; Hoade, R.; Hong, B.; Hoover, A.; Horaguchi, T.; Hunter, C.T.; Hurst, D.E.; Ichihara, T.; Imai, K.; Isenhower, L.; Isenhower, L.; Ishihara, M.; Jang, W. Y.; Johnson, J. R.; Jouan, D.; Kamihara, N.; Kamyshkov, Yu.; Kang, J. H.; Kapoor, S. S.; Kim, D.J.; Kim, D.-W.; Kim, G.-B.; Kinnison, W. W.; Klinksiek, S.; Kluberg, L.; Kobayashi, Hisao; Koehler, D.; Kotchenda, L.; Kuberg, C. H.; Kurita, K.; Kweon, M. J.; Kwon, Y.; Kyle, G. S.; LaBounty, J.; Lajoie, J. G.; Lee, D.M.; Lee, S.; Leitch, M. J.; Li, Z.; Liu, M.X.; Liu, X.; Liu, Y.; Lockner, E.; Lopez, Julian; Mao, YJ; Martinez, X.B.; McCain, M. C.; McGaughey, P. L.; Mioduszewski, S.; Mischke, R. E.; Mohanty, A. K.; Montoya, B.C.; Moss, J.; Murata, J.; Murray, M.; Nagle, J. L.; Nakada, Y.; Newby, J.; Obenshain, F. E.; Palounek, A. P.T.; Papavassiliou, V.; Pate, S. F.; Plášil, F.; Pope, K.; Qualls, J. M.; Rao, G. Krishna; Read, K. F.; Robinson, S.; Roche, G.; Romana, A.; Rosnet, P.; Roth, R. F.; Saito, N.; Sakuma, T.; Sandhoff, W.F.; Sanfratello, L.; Sato, H.; Savino, Raffaele; Sekimoto, M.; Shaw, M. R.; Shibata, T. A.; Sim, K. S.; Skank, H.D.; Smith, D.; Smith, G. D.; Sondheim, W. E.; Sörensen, S.; Staley, F.; Stankus, P. W.; Steffens, S.; Stein, Eckart; Stepanov, M.; Stokes, Wayne; Sugioka, M.; Sun, Z.; Taketani, A.; Taniguchi, E.; Tepe, J. D.; Thornton, G.; Tian, W. D.; Tojo, J.; Torii, H.; Towell, R. S.; Tradeski, J.; Vassent, M.; Velissaris, C.; Villatte, L.; Wan, Y.; Watanabe, Y.; Watkins, L.C.; Whitus, B. R.; Williams, C. L.; Willis, P.S.; Wong-Swanson, Belinda; Yang, Yi; Yoneyama, Satoshi; Young, G. R.; Zhou, S.

doi:10.1016/s0168-9002(02)01955-1

Cited by 65 publications

(33 citation statements)

References 5 publications

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“…Dimuons from ψ(2S) and ψ(1S) decays were measured with the PHENIX muon spectrometer, which comprises two arms covering the forward and backward rapidity intervals 1.2 < |y| < 2.2 [26]. Muons considered in this analysis pass through a the forward vertex tracking detector (FVTX) [27], a hadron absorber with a thickness of ∼ 10 interaction lengths, then through three multi-plane cathode strip tracking chambers which reside in a radial magnetic field.…”

Section: Methodsmentioning

confidence: 99%

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. C
Self Cite

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Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in p+p, p+Al, p+Au, and The PHENIX Collaboration has measured the ratio of the yields of ψ(2S) to ψ(1S) mesons produced in p+p, p+Al, p+Au, and 3 He+Au collisions at √ s N N = 200 GeV over the forward and backward rapidity intervals 1.2 < |y| < 2.2. We find that the ratio in p+p collisions is consistent with measurements at other collision energies. In collisions with nuclei, we find that in the forward (p-going or 3 He-going) direction, the relative yield of ψ(2S) mesons to ψ(1S) mesons is consistent with the value measured in p+p collisions. However, in the backward (nucleus-going) direction, the ψ(2S) is preferentially suppressed by a factor of ∼2. This suppression is attributed in some models to breakup of the weakly-bound ψ(2S) through final state interactions with comoving particles, which have a higher density in the nucleus-going direction. These breakup effects may compete with color screening in a deconfined quark-gluon plasma to produce sequential suppression of excited quarkonia states.

show abstract

Section: Methodsmentioning

confidence: 99%

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. C
Self Cite

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“…Decays of J/ψ → µ + µ − were measured in the muon spectrometer [25] for 1.2 < y < 2.2 and full azimuthal angle. Collisions are identified by triggering on a minimal multiplicity of hits in two beambeam counters (BBC) [26] placed at 3.0 < |η| < 3.9.…”

Section: Experimental Setup and J/ψ Selectionmentioning

confidence: 99%

“…Each MuTr station is composed of three (Stations 1 and 2) or two (Station 3) measurement planes ("gaps") [25]. A cluster is the collection of ionization energy from the passage of a charged particle in the measurement plane.…”

Section: Figmentioning

confidence: 99%

Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at s
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. D
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2
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We report the first measurement of the full angular distribution for inclusive J/ψ → µ + µ − decays in p+p collisions at √ s = 510 GeV. The measurements are made for J/ψ transverse momentum 2 < pT < 10 GeV/c and rapidity 1.2 < y < 2.2 in the Helicity, Collins-Soper, and Gottfried-Jackson reference frames. In all frames the polar coefficient λ θ is strongly negative at low pT and becomes close to zero at high pT , while the azimuthal coefficient λ φ is close to zero at low pT , and becomes slightly negative at higher pT . The frame-independent coefficientλ is strongly negative at all pT in all frames. The data are compared to the theoretical predictions provided by nonrelativistic quantum chromodynamics models.

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“…Each forward muon arm [32] contains a hadron absorber, three stations of cathode strip chambers for particle tracking (MuTr), and a Muon Identifier (MuID). The hadron absorber has two parts: a 20 cm thick conical shaped copper absorber and 60 cm of magnet iron.…”

Section: Experimental Apparatus and The Data Setmentioning

confidence: 99%

Ground and excited state charmonium production inp+pcollisions ats=200 GeV

Adare¹,

Afanasiev²,

Aidala³

et al. 2012

Phys. Rev. D

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We report on charmonium measurements [J/ψ (1S), ψ ′ (2S), and χc (1P)] in p+p collisions at √ s = 200 GeV. We find that the fraction of J/ψ coming from the feed-down decay of ψ ′ and χc in the midrapidity region (|y| < 0.35) is 9.6 ± 2.4% and 32 ± 9%, respectively. We also present the pT and rapidity dependencies of the J/ψ yield measured via dielectron decay at midrapidity (|y| < 0.35) and via dimuon decay at forward rapidity (1.2 < |y| < 2.2). The statistical precision greatly exceeds that reported in our previous publication [Phys. Rev. Lett. 98, 232002 (2007)]. The new results are compared with other experiments and discussed in the context of current charmonium production models.

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PHENIX Muon Arms

Cited by 65 publications

References 5 publications

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. C
Self Cite

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. C
Self Cite

Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at s
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. D
Self Cite
4
2
7
0
View full text Add to dashboard Cite

Ground and excited state charmonium production inp+pcollisions ats=200 GeV

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PHENIX Muon Arms

Cited by 65 publications

References 5 publications

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in Adare1, Aidala2, Ajitanand3 et al. 2017Phys. Rev. CSelf Cite

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in Adare1, Aidala2, Ajitanand3 et al. 2017Phys. Rev. CSelf Cite

Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at sAdare1, Aidala2, Ajitanand3 et al. 2017Phys. Rev. DSelf Cite4270View full textAdd to dashboardCite

Ground and excited state charmonium production inp+pcollisions ats=200 GeV

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Product

Resources

About

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. C
Self Cite

Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. C
Self Cite

Angular decay coefficients of J/ψ mesons at forward rapidity from p+p collisions at s
Adare¹,
Aidala²,
Ajitanand³
et al. 2017
Phys. Rev. D
Self Cite
4
2
7
0
View full text Add to dashboard Cite