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Journal Articles

Large collectivity in $$^{29}$$Ne at the boundary of the island of inversion

Revel, A.*; Wu, J.*; Iwasaki, Hironori*; Ash, J.*; Bazin, D.*; Brown, B. A.*; Chen, J.*; Elder, R.*; Farris, P.*; Gade, A.*; et al.

Physics Letters B, 838, p.137704_1 - 137704_7, 2023/03

 Times Cited Count:1 Percentile:68.16(Astronomy & Astrophysics)

no abstracts in English

Journal Articles

Event structure and double helicity asymmetry in jet production from polarized $$p + p$$ collisions at $$sqrt{s}$$ = 200 GeV

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.

Physical Review D, 84(1), p.012006_1 - 012006_18, 2011/07

 Times Cited Count:29 Percentile:72.31(Astronomy & Astrophysics)

We report on the event structure and double helicity asymmetry ($$A_{LL}$$) of jet production in longitudinally polarized $$p + p$$ collisions at $$sqrt{s}$$ = 200 GeV. Photons and charged particles were measured by the PHENIX experiment. Event structure was compared with the results from PYTHIA event generator. The production rate of reconstructed jets is satisfactorily reproduced with the next-to-leading-order perturbative QCD calculation. We measured $$A_{LL}$$ = -0.0014 $$pm$$ 0.0037 at the lowest $$P_T$$ bin and -0.0181 $$pm$$ 0.0282 at the highest $$P_T$$ bin. The measured $$A_{LL}$$ is compared with the predictions that assume various $$Delta G(x)$$ distributions.

Journal Articles

Identified charged hadron production in $$p + p$$ collisions at $$sqrt{s}$$ = 200 and 62.4 GeV

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Armendariz, R.*; et al.

Physical Review C, 83(6), p.064903_1 - 064903_29, 2011/06

 Times Cited Count:184 Percentile:99.44(Physics, Nuclear)

Transverse momentum distributions and yields for $$pi^{pm}, K^{pm}, p$$, and $$bar{p}$$ in $$p + p$$ collisions at $$sqrt{s}$$ = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the RHIC. We present the inverse slope parameter, mean transverse momentum, and yield per unit rapidity at each energy, and compare them to other measurements at different $$sqrt{s}$$ collisions. We also present the scaling properties such as $$m_T$$ and $$x_T$$ scaling and discuss the mechanism of the particle production in $$p + p$$ collisions. The measured spectra are compared to next-to-leading order perturbative QCD calculations.

Journal Articles

Azimuthal correlations of electrons from heavy-flavor decay with hadrons in $$p+p$$ and Au+Au collisions at $$sqrt{s_{NN}}$$ = 200 GeV

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Aramaki, Y.*; et al.

Physical Review C, 83(4), p.044912_1 - 044912_16, 2011/04

 Times Cited Count:8 Percentile:49.7(Physics, Nuclear)

Measurements of electrons from the decay of open-heavy-flavor mesons have shown that the yields are suppressed in Au+Au collisions compared to expectations from binary-scaled $$p+p$$ collisions. Here we extend these studies to two particle correlations where one particle is an electron from the decay of a heavy flavor meson and the other is a charged hadron from either the decay of the heavy meson or from jet fragmentation. These measurements provide more detailed information about the interaction between heavy quarks and the quark-gluon matter. We find the away-side-jet shape and yield to be modified in Au+Au collisions compared to $$p+p$$ collisions.

Journal Articles

Measurement of neutral mesons in $$p$$ + $$p$$ collisions at $$sqrt{s}$$ = 200 GeV and scaling properties of hadron production

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Y.*; Al-Bataineh, H.*; Alexander, J.*; Aoki, K.*; Aphecetche, L.*; Armendariz, R.*; et al.

Physical Review D, 83(5), p.052004_1 - 052004_26, 2011/03

 Times Cited Count:175 Percentile:98.48(Astronomy & Astrophysics)

The PHENIX experiment at RHIC has measured the invariant differential cross section for production of $$K^0_s$$, $$omega$$, $$eta'$$ and $$phi$$ mesons in $$p + p$$ collisions at $$sqrt{s}$$ = 200 GeV. The spectral shapes of all hadron transverse momentum distributions are well described by a Tsallis distribution functional form with only two parameters, $$n$$ and $$T$$, determining the high $$p_T$$ and characterizing the low $$p_T$$ regions for the spectra, respectively. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.

Journal Articles

Intruder configurations in the A=33 isobars; $$^{33}$$Mg and $$^{33}$$Al

Tripathi, V.*; Tabor, S. L.*; Mantica, P. F.*; Utsuno, Yutaka; Bender, P.*; Cook, J.*; Hoffman, C. R.*; Lee, S.*; Otsuka, Takaharu*; Pereira, J.*; et al.

Physical Review Letters, 101(14), p.142504_1 - 142504_4, 2008/10

 Times Cited Count:52 Percentile:86.46(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Excited intruder states in $$^{32}$$Mg

Tripathi, V.*; Tabor, S. L.*; Bender, P.*; Hoffman, C. R.*; Lee, S.*; Pepper, K.*; Perry, M.*; Mantica, P.*; Cook, J. M.*; Pereira, J.*; et al.

Physical Review C, 77(3), p.034310_1 - 034310_8, 2008/03

 Times Cited Count:32 Percentile:83.79(Physics, Nuclear)

Excited states in $$^{32}$$Mg have been observed from a $$beta$$-decay experiment of $$^{32}$$Na which was performed at National Superconducting Cyclotron Laboratory in Michigan State University. The 2.1 MeV state proposed previously was denied because the corresponding $$gamma$$ ray is found to be located elsewhere. New level scheme is proposed and compared with the Monte Carlo shell model by JAEA. The ground state of $$^{32}$$Na appears to be a negative parity states from the decay pattern and the calculation. We suggested that the configuration of the states which are strongly populated via the $$beta$$ decay is 3p-3h, since the ground state of the parent nucleus is most likely 2p-3h character.

Journal Articles

Competition between normal and intruder states inside the "island of inversion"

Tripathi, V.*; Tabor, S. L.*; Mantica, P. F.*; Utsuno, Yutaka; Bender, P.*; Cook, J. M.*; Hoffman, C. R.*; Lee, S.*; Otsuka, Takaharu*; Pereira, J.*; et al.

Physical Review C, 76(2), p.021301_1 - 021301_5, 2007/08

 Times Cited Count:27 Percentile:81.95(Physics, Nuclear)

no abstracts in English

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