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3.0

Jun 29, 2018
06/18

by
Xing Xu; Meng Wang; Peng Shuai; Rui-Jiu Chen; Xin-Liang Yan; Yu-Hu Zhang; You-Jin Yuan; Hu-Shan Xu; Xiao-Hong Zhou; Yuri A. Litvinov; Sergey Litvinov; Xiao-Lin Tu; Xiang-Cheng Chen; Chao-Yi Fu; Wen-Wen Ge; Zhuang Ge; Xue-Jing Hu; Wen-Jia Huang; Da-Wei Liu; Yuan-Ming Xing; Qi Zeng; Wei Zhang

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The concept of isochronous mass spectrometry (IMS) applying two time-of-flight (TOF) detectors originated many years ago at GSI. However, the corresponding method for data analysis has never been discussed in detail. Recently, two TOF detectors have been installed at CSRe and the new working mode of the ring is under test. In this paper, a data analysis method for this mode is introduced and tested with a series of simulations. The results show that the new IMS method can significantly improve...

Topics: Accelerator Physics, Nuclear Experiment, Physics, Instrumentation and Detectors

Source: http://arxiv.org/abs/1603.07169

2
2.0

Jun 30, 2018
06/18

by
Qing-Yong Lin; Xiang Liu; Hu-Shan Xu

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In the present work we explore the production potential of $\Lambda_c(2880)^+$ at PANDA. With the $J^P=\frac{5}{2}^+$ assignment to $\Lambda_c(2880)^+$, we calculate the differential and total cross sections of $p\bar{p}\to \Lambda_c^-\Lambda_c(2880)^+$. We also perform the Dalitz plot analysis and give the $pD^0$ invariant mass spectrum distribution of the process $p\bar{p}\to \Lambda_c^-pD^0$, where the signal and background contributions are considered. Our numerical results indicate that...

Topics: High Energy Physics - Phenomenology, High Energy Physics - Experiment

Source: http://arxiv.org/abs/1403.3264

3
3.0

Jun 29, 2018
06/18

by
Xing Xu; Meng Wang; Yu-hu Zhang; Hu-shan Xu; Peng Shuai; Xiao-lin Tu; Yuri A. Litvinov; Xiao-hong Zhou; Bao-hua Sun; You-jin Yuan; Jia-wen Xia; Jian-cheng Yang; KLaus Blaum; Rui-jiu Chen; Xiang-cheng Chen; Chao-yi Fu; Zhuang Ge; Zheng-guo Hu; Wen-jia Huang; Da-wei Liu; Yi-hua Lam; Xin-wen Ma; Rui-shi Mao; T. Uesaka; Guo-ging Xiao; Yuan-ming Xing; T. Yamaguchi; Y. Yamaguchi; Qi Zeng; Xin-liang Yan; Hong-wei Zhao; Tie-cheneg Zhao; Wei Zhang; Wen-long Zhan

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In this paper, we present direct mass measurements of neutron-rich $^{86}$Kr projectile fragments conducted at the HIRFL-CSR facility in Lanzhou by employing the Isochronous Mass Spectrometry (IMS) method. The new mass excesses of $^{52-54}$Sc nuclides are determined to be -40492(82), -38928(114), -34654(540) keV, which show a significant increase of binding energy compared to the reported ones in the Atomic Mass Evaluation 2012 (AME12). In particular, $^{53}$Sc and $^{54}$Sc are more bound by...

Topic: Nuclear Experiment

Source: http://arxiv.org/abs/1603.06404

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31

Sep 22, 2013
09/13

by
Xu Cao; Bing-Song Zou; Hu-Shan Xu

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With an effective Lagrangian approach, we analyze several NN \to NN\pi\pi channels by including various resonances with mass up to 1.72 GeV. For the channels with the pion pair of isospin zero, we confirm the dominance of N*(1440)\to N\sigma in the near threshold region. At higher energies and for channels with the final pion pair of isospin one, we find large contributions from N*(1440)\to \Delta\pi, double-Delta, \Delta(1600) \to N*(1440)\pi, \Delta(1600) \to \Delta\pi and \Delta(1620) \to...

Source: http://arxiv.org/abs/1004.0140v1

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44

Sep 19, 2013
09/13

by
Xu Cao; Bing-Song Zou; Hu-Shan Xu

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With an effective Lagrangian approach, we give a full analysis on the $NN \to NN\pi\pi$ and $\bar{N}N\to \bar{N}N\pi\pi$ reactions by exploring the roles of various resonances with mass up to 1.72 GeV. We find large contributions from $\Delta$, $N^*(1440)$, $\Delta(1600)$ and $\Delta(1620)$ resonances. Our calculations also indicate sizeable contributions from nucleon poles for the energies close to the threshold. A good description to the existing data of different isospin channels of $NN\to...

Source: http://arxiv.org/abs/1009.1063v1

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38

Sep 21, 2013
09/13

by
Xu Cao; Ju-Jun Xie; Bing-Song Zou; Hu-Shan Xu

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The N*(1535) resonance contributions to the pn->d\phi reaction are evaluated in an effective Lagrangian model. The \pi-, \eta-, and \rho-meson exchange are considered. It is shown that the contributions from \pi- and \rho-meson exchange are dominant, while the contribution from \eta-meson exchange is negligibly small. Our theoretical results reproduce the experimental data of both total cross section and angular distribution well. This is another evidence that the N*(1535) resonance has...

Source: http://arxiv.org/abs/0905.0260v2

2
2.0

Jul 22, 2021
07/21

by
Chen-Gui, Wang Sen-Shan，xu Yong-Xia，cao Zhi-Zhong，shi Shan-Li，he

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42

Sep 18, 2013
09/13

by
Qi Wang; Jian-Long Han; Yu-Chuan Dong; Song-Lin Li; Li-Min Duan; Hu-Shan Xu; Hua-Gen Xu; Ruo-Fu Chen; He-Yu Wu; Zhen Bai; Zhi-Chang Li; Xiu-Qin Lu; Kui Zhao; Jian-Cheng Liu; Guo-Ji Xu; S. Yu. Kun

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We have experimentally tested a recently suggested possibility for anomalous sensitivity of the cross sections of dissipative heavy ion collisions. Cross sections for the $^{19}$F+$^{27}$Al dissipative collisions were measured at the fixed energy 118.75 MeV of the $^{19}$F for the 12 different beam spots on the same target foil. The data demonstrate dramatic differences between the cross sections for the different beam spots. The effect may indicate deterministic randomness in complex quantum...

Source: http://arxiv.org/abs/0705.4502v1

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Jul 20, 2013
07/13

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Qing-Yong Lin; Xiang Liu; Hu-Shan Xu

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In this work, we calculate the total cross sections and the center-of-mass frame angular distributions of the charmonium production plus a light meson by the low energy $p\bar{p}$ interaction. The results of $p\bar{p}\to \pi^0 \Psi$ with and without form factor (FF) indicate that the FF contribution in the calculation cannot be ignored. The obtained cross section of $p\bar{p}\to \pi^0 J/\psi$ with FF can fit the E760 data well. We also predict the total cross sections and the center-of-mass...

Source: http://arxiv.org/abs/1203.4029v3

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0.0

Aug 30, 2021
08/21

by
Shan Xu; Jorge Almeida; Dietmar Heinke

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Source: https://osf.io/4t3dw/

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11

Mar 2, 2021
03/21

by
Li Ping Pu Zhu-Mao Xu Luo-Shan Xu Guo-Jun

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32

Sep 21, 2013
09/13

by
Gao-Chan Yong; Xurong Chen; Hu-Shan Xu; Wei Zuo

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Based on a Relativistic Boltzmann-Uehling- Uhlenbeck transport model, proton and $^{3}$He induced reactions on $^{197}$Au target at beam energies of 2.8, 5, 10 and 16.587 GeV/nucleon are studied. It is found that compared with proton induced reactions, $^{3}$He induced reactions give larger cross sections of pion production, about 5 times those of the proton induced reactions. And more importantly, pion production from $^{3}$He induced reaction is more inclined to low-angle emission. Neutrino...

Source: http://arxiv.org/abs/1106.6108v2

4
4.0

Jul 22, 2021
07/21

by
Qiu-Ling, Pan; Tian, Li; Qiang, He; Zhen-Gang, Ma; Xiao-Dong, Fan; Xiao-Yan, Zhang; Yan-Li, Wang; Ze-Yang, Zhou; Jin-Shan, Xu

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63
63

Sep 21, 2013
09/13

by
Samantha Molinaro; Myron Hlynka; Shan Xu

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A special customer must complete service from two servers in series, in either order, each with an M/M/1 queueing system. It is assumed that the two queueing system lengths are independent with initial numbers of customers a and b at the instant when the special customer arrives. We find the expected total time (ETT) for the special customer to complete service. We show that even if the interarrival and service time parameters of two queues are identical, there exist examples (specific values...

Source: http://arxiv.org/abs/1108.1179v1

3
3.0

Jul 22, 2021
07/21

by
Yong-Mei, Liu; Hong-Xia, Shi; Yan, Li; Zhen-Gang, Ma; Lin-Ling, Wang; Jin-Shan, Xu; Ze-Yang, Zhou; Xiao-Qun, Dang

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35

Sep 21, 2013
09/13

by
Zhen Ouyang; Ju-Jun Xie; Bing-Song Zou; Hu-Shan Xu

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New measurement by CELSIUS-WASA Collaboration on the pp->pn pi+ reaction reveals clear evidence for the presence of the Roper resonance N*(1440) which has been ignored in previous theoretical calculations. In this article, based on an effective Lagrangian approach and available knowledge on the Roper resonance, we investigate the role of the Roper resonance for the pp->pn pi+ reaction. It is found that the contribution from the Roper resonance N*(1440) becomes significant for kinetic...

Source: http://arxiv.org/abs/0808.3257v3

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49

Sep 18, 2013
09/13

by
Xiao-Feng Luo; Xin Dong; Ming Shao; Ke-Jun Wu; Cheng Li; Hong-Fang Chen; Hu-Shan Xu

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A Relativistic Transport Model (ART1.0) is applied to simulate the stopping effects in tip-tip and body-body U+U collisions, at a beam kinetic energy of 520 MeV/nucleon. Our simulation results have demonstrated that both central collisions of the two extreme orientations can achieve full stopping, and also form a bulk of hot, dense nuclear matter with a sufficiently large volume and long duration, due to the largely deformed uranium nuclei. The nucleon sideward flow in the tip-tip collisions is...

Source: http://arxiv.org/abs/0704.0424v2

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31

Sep 19, 2013
09/13

by
Xu Cao; Bing-Song Zou; Hu-Shan Xu

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We extend our recent phenomenological study of $pN \to NN\pi\pi$ reactions to the $\bar{p}N \to \bar{N}N\pi\pi$ reactions for anti-proton beam momenta up to 3.0 GeV within an effective Lagrangian approach. The contribution of $N^*(1440)$ with its $N\sigma$ decay mode is found to be dominant at the energies close to threshold for $\bar NN\pi^+\pi^-$ and $\bar NN\pi^0\pi^0$ channels. At higher energies or for $p\bar n\pi^-\pi^-$ and $\bar NN\pi^\pm\pi^0$ channels where $N^*(1440)\to N\sigma$ mode...

Source: http://arxiv.org/abs/1009.1060v3

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Sep 21, 2013
09/13

by
J. X. Lu; Bo Ning; Ran Wei; Shan-Shan Xu

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A general non-threshold BPS (F, D$_p$) (or (D$_{p - 2}$, D$_p$)) bound state can be described by a boundary state with a quantized world-volume electric (or magnetic) flux and is characterized by a pair of integers $(m, n)$. With this, we calculate explicitly the interaction amplitude between two such non-threshold bound states with a separation $Y$ when each of the states is characterized by a pair of integers ($m_i, n_i$) with $i = 1, 2$. With this result, one can show that the non-degenerate...

Source: http://arxiv.org/abs/0902.1716v3

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54

Sep 18, 2013
09/13

by
J. X. Lu; Bo Ning; Shibaji Roy; Shan-Shan Xu

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In this note, we will discuss two aspects of brane-antibrane forces. In one aspect, we generalize the force calculation of D0-${\bar {\rm D}}$0 of Banks and Susskind to Dp-${\bar {\rm D}}p$ for $1\le p \leq 8$. In particular, we find that the force is also divergent for p = 1 while for the other cases ($p \ge 2$) the forces are in general finite when $Z \to 0^+$, where $Z = \frac{Y^2}{2\pi^2\alpha'} - 1$ with Y, the brane-antibrane separation. However, the forces are divergent for all cases...

Source: http://arxiv.org/abs/0705.3709v4

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6.0

Apr 5, 2021
04/21

by
Shi-Ming, Chen; Mu-Gen, Chi; Yi, Yang; Xiao-Shan, Xu

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40

Sep 22, 2013
09/13

by
J. X. Lu; Shan-Shan Xu

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We explore various properties of interaction between D$_p$ and D$_{p'}$ with each carrying a worldvolume flux and with the $p'$-branes placed along $p'$ spatial worldvolume directions of the p-branes at a separation when $p - p' = 2$. Carefully analyzing the annulus amplitudes calculated via the boundary state approach, we find that many features of amplitudes remain similar to those studied when $p = p'$ such as the nature of force on the brane separation, the onset of various instabilities...

Source: http://arxiv.org/abs/0906.0679v2

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7.0

Jul 22, 2021
07/21

by
Ying, Gu; Xian-Li, Bin; Lu, Liu; Jun, Zhou; Zhen-Gang, Ma; Hong-Wei, Tan; Ze-Yang, Zhou; Jin-Shan, Xu

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58

Sep 23, 2013
09/13

by
J. X. Lu; Shan-Shan Xu

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We extend the amplitude calculations of \cite{Lu:2009yx} to exhaust the remaining cases for which one set of D$_p$ branes carrying a flux (electric or magnetic) is placed parallel at separation to the other set carrying also a flux but with the two fluxes sharing at most one common field-strength index. We then find that the basic structure of amplitudes remains the same when the two fluxes share at least one common index but it is more general when the two fluxes share no common index. We...

Source: http://arxiv.org/abs/0904.4112v4

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64

Sep 19, 2013
09/13

by
Sang-Jin Sin; Shan-Shan Xu; Yang Zhou

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We consider the gravity dual of strongly coupled system at a Lifshitz-fixed point and finite temperature, which was constructed in a recent work arXiv:0909.0263. We construct an Abelian Higgs model in that background and calculate condensation and conductivity using holographic techniques. We find that condensation happens and DC conductivity blows up when temperature turns below a critical value.

Source: http://arxiv.org/abs/0909.4857v4