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arXiv 1402.6844nucl-ex
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极化中子-质子散射新共振的证据

Evidence for a New Resonance from Polarized Neutron-Proton Scattering

P. Adlarson, W. Augustyniak, W. Bardan, M. Bashkanov, F. S. Bergmann, M. Berlowski, H. Bhatt, M. Buescher, H. Calen. I. Ciepa, H. Clement, D. Coderre, E. Czerwi… 展开作者

P. Adlarson, W. Augustyniak, W. Bardan, M. Bashkanov, F. S. Bergmann, M. Berlowski, H. Bhatt, M. Buescher, H. Calen. I. Ciepa, H. Clement, D. Coderre, E. Czerwinski, K. Demmich, E. Doroshkevich, R. Engels, A. Erven, W. Erven, W. Eyrich, P. Fedorets, K. Foehl, K. Fransson, F. Goldenbaum, P. Goslawski, A. Goswami, K. Grigoyev, C. -O. Gullstroem, F. Hauenstein, L. Heijkenskjoeld, V. Hejny, M. Hodana, B. Hoistad, N. Huesken, A. Jany, B. R. Jany, L. Jarczyk, T. Johansson, B. Kamys, G. Kemmerling, F. A. Khan, A. Khoukaz, D. A. Kirrilov, S. Kistryn, H. Kleines, B. Klos, M. Krapp, W. Krzemien, P. Kulessa, A. Kupsc, K. Lalwani, D. Lersch, B. Lorentz, A. Magiera, R. Maier, P. Marciniewski, B. Marianski, M. Mikirtychiants, H. -P. Morsch, P. Moskal, H. Ohm, I. Ozerianska, E. Perez del Rio, N. M. Piskunov, P. Podkopal, D. Prasuhn, A. Pricking, D. Pszczel, K. Pysz, A. Pysniak, C. F. Redmer, J. Ritman, A. Roy, Z. Rudy, S. Sawant, S. Schadmand, T. Sefzick, V. Serdyuk, R. Siudak, T. Skorodko, M. Skurzok, J. Smyrski, V. Sopov, R. Stassen, J. Stepaniak, E. Stephan, G. Sterzenbach, H. Stockhorst, H. Stroeher, A. Szczurek, A. Taeschner, A. Trzcinski, R. Varma, G. J. Wagner, M. Wolke, A. Wronska, P. Wuestner, P. Wurm, A. Yamamoto, L. Yurev, J. Zabierowski, M. J. Zielinski, A. Zink, J. Zlomanczuk, P. Zupranski, M. Zurek, R. L. Workman, W. J. Briscoe, I. I. Strakovsky

摘要:

对最近在双介子聚变通道$pn \to dπ^0π^0$和$pn \to dπ^+π^-$中观测到的窄共振结构$d^*$与$I(J^P) = 0(3^+)$、$M \approx$ 2380 MeV/ $c^2$和$Γ\approx$ 70 MeV的准自由极化$\vec{n}p$散射进行了独家的、运动学上完全的高统计测量。实验是在COSY的WASA探测器上进行的,极化氘束撞击氢芯块靶,并利用准自由过程$\vec{d}p \to np + p_{spectator}$。这样,在大角度范围内测量$np$分析功率$A_y$。所获得的$A_y$角分布系统地偏离当前SAID SP 07 NN分波解。将新的$A_y$数据加入SAID分析中,在$^3D_3 - ^3G_3$波中产生一个极点,正如从$d^*$共振假设中所预期的那样。

英文摘要:

Exclusive and kinematically complete high-statistics measurements of quasifree polarized $\vec{n}p$ scattering have been performed in the energy region of the narrow resonance structure $d^*$ with $I(J^P) = 0(3^+)$, $M \approx$ 2380 MeV/$c^2$ and $Γ\approx$ 70 MeV observed recently in the double-pionic fusion channels $pn \to dπ^0π^0$ and $pn \to dπ^+π^-$. The experiment was carried out with the WASA detector setup at COSY having a polarized deuteron beam impinged on the hydrogen pellet target and utilizing the quasifree process $\vec{d}p \to np + p_{spectator}$. That way the $np$ analyzing power $A_y$ was measured over a large angular range. The obtained $A_y$ angular distributions deviate systematically from the current SAID SP07 NN partial-wave solution. Incorporating the new $A_y$ data into the SAID analysis produces a pole in the $^3D_3 - ^3G_3$ waves as expected from the $d^*$ resonance hypothesis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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