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Journal Articles

Optomechanical response of a strongly interacting Fermi gas

Helson, V.*; Zwettler, T.*; Roux, K.*; Konishi, Hideki*; Uchino, Shun; Brantut, J.-P.*

Physical Review Research (Internet), 4(3), p.033199_1 - 033199_10, 2022/09

We study a Fermi gas with strong, tunable interactions dispersively coupled to a high-finesse cavity. Upon probing the system along the cavity axis, we observe a strong optomechanical Kerr nonlinearity originating from the density response of the gas to the intracavity field. Measuring the non-linearity as a function of interaction strength, we extract the zero-frequency density response function of the Fermi gas, and find an increase by a factor of two from the Bardeen-Cooper-Schrieffer to the Bose-Einstein condensate regime. The results are in quantitative agreement with a theory based on operator-product expansion, expressing the density response in terms of universal functions of the interactions, the contact and the internal energy of the gas.

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

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

Study of the IDGS Technique for Mixed Plutonium-Uranium Oxide (MOX) Samples

Sumi, Mika; Masashige, Kobayashi,*; Onishi, Sumitaka; Suzuki, Toru; Li, T. K.*; Vo, D.*

Final Program P.657 #229, 657- Pages, 2004/00

The Isotope Dilution Gamma-ray Spectrometry (IDGS) technique has developed at LANL. Feasibility study to implement IDGS for measuring MOX samples at PFC has performed and its results will be presented.

Journal Articles

Tritium decontamination of TFTR carbon tiles employing ultra violet light

Shu, Wataru; Ohira, Shigeru; Gentile, C. A.*; Oya, Yasuhisa; Nakamura, Hirofumi; Hayashi, Takumi; Iwai, Yasunori; Kawamura, Yoshinori; Konishi, Satoshi; Nishi, Masataka; et al.

Journal of Nuclear Materials, 290-293, p.482 - 485, 2001/03

 Times Cited Count:10 Percentile:59.01(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Measurement of collected charge induced by heavy ion microbeam in SOI devices

Hirao, Toshio; *; *; Nashiyama, Isamu; Matsuda, Sumio*; Nemoto, N.*; Onishi, K.*

SDM97-194, p.57 - 63, 1998/02

no abstracts in English

Journal Articles

Effects of gamma-ray irradiation and the mechanisms on electrical characteristics of SiC metal-oxide-semiconductor structures

Yoshikawa, Masahito; Oshima, Takeshi; Ito, Hisayoshi; Nashiyama, Isamu; *; Onishi, K.*; Okumura, Hajime*; Yoshida, Sadafumi*

Denshi Joho Tsushin Gakkai Rombunshi, C-II, 81(1), p.140 - 150, 1998/01

no abstracts in English

Journal Articles

Effects of $$gamma$$-ray irradiation on the electrical characteristics of SiC metal-oxide-semiconductor structures

Yoshikawa, Masahito; Oshima, Takeshi; Ito, Hisayoshi; Nashiyama, Isamu; Takahashi, Yoshihiro*; Onishi, K.*; Okumura, Hajime*; Yoshida, Sadafumi*

Electronics and Communication in Japan., Part2, 81(10), p.37 - 47, 1998/00

no abstracts in English

Journal Articles

Generation mechanisms of trapped charges in oxide layers of 6H-SiC MOS structures irradiated with $$gamma$$-rays

Yoshikawa, Masahito; *; Oshima, Takeshi; Ito, Hisayoshi; Nashiyama, Isamu; *; Onishi, K.*; Okumura, Hajime*; Yoshida, Sadafumi*

Mater. Sci. Forum, 264-268, p.1017 - 1020, 1998/00

no abstracts in English

JAEA Reports

Tritium test of the tritium processing components under the Annex III US-Japan collaboration; Annex III final report

Konishi, Satoshi; Yoshida, Hiroshi; Naruse, Yuji; K.E.Binning*; R.V.Carlson*; Bartlit, J. R.*; Anderson, J. L.*

JAERI-M 93-090, 21 Pages, 1993/03

JAERI-M-93-090.pdf:0.6MB

no abstracts in English

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