COSMIC RAY'S DATA OF MEAN LIVES OF D MESONS AND ∑c+ BARYON

Zhao Shu-song; Peng Shou-li

Chinese Physics C> 1980, Vol. 4> Issue(4) : 531-535

COSMIC RAY'S DATA OF MEAN LIVES OF D MESONS AND ∑_c⁺ BARYON

Abstract
HTML
Reference
Related

PDF

Abstract：
A sieve-comparison method is proposed according to the accelerator's data ofcharmed particles to identify the properties of the X-particles observed in high energycosmic ray interactions. The principles of the sieve-comparison method are as follows: 1. The cross section σ_{xx} of these X-particles produced in pair should be appro-ximately equal to the cross section σ_DD of D meson produced in pair. 2. The empirical selection rules of the decay in weak interaction from the experi-ments using accelerators should be suitable to these X-particles: charmed number|Δc|=1, strangeness ΔS=Δc=1, isospin |ΔI₃| =1→|ΔI|=1, (nonlepton). 3. The charge and the decay channel should be in coincidence with the empiricalselection rule, Q=I₃+(B+C)/2 for each X particle and it's transverse momentumshould be large (P_⊥=400-1000MeV/c). 4. For the same kind of the particles, their width-mass ratio (г/M) should beof the same order of magnitude. All the X particles observed so far in emulsion chambers have been analyzedaccording to this method, it is found that they are possibly D, D, Σ_c⁺, Λ_c⁺, E_cc⁺, (seetable I). Inversely, we may estimate the mean lives and masses of new charmed parti-cles observed in accelerator's experiments according to cosmic ray's data. The resultsare shown in table II.

References

[1]

K. Niu, Proc. 19th Int. Conf. High Energy Physics, B10(1978), 447, Tokyo, H, Fuchi et al.,宇宙线研究,23 (1978 ). 3.[S] C. Bricman et al.. Phys. Lett., 75B(1978). 1[3] H. Fuchi et al. 15th Int,. Cosmic Ray Conf., 7 (1917),376.[4] L. Baum et al., Phys. Lett., 77B(1978), 337.[5] K. Hoshino et al., 14th Int. Cosmic Conf. 7(1975).2448.[6] M. Peshkin et al,Nucl. Phys., B122(1977),144; A. Pais et al., Plays. Rev., D15(1977), 2529.[7] 赵树松、彭守礼,桑拉子与高能宇宙线中的新粒子,(待发表).

[1]	CHEN Bing , WANG Deng-Xia , ZHANG Ai-Lin . J^P assignments of Λ_c⁺ baryons. Chinese Physics C, 2009, 33(12): 1327-1330. doi: 10.1088/1674-1137/33/12/047
[2]	XIE Wan , OUYANG Qun , XIE Yi-Gang , ZHENG Shu-Cheng , HAN Hong-Guang , CHENG Shao-Chen , YANG Yi . Performance Study of Monitored Drift Tube Chambers with Cosmic Rays. Chinese Physics C, 2007, 31(11): 1056-1061.
[3]	WANG Yi , CHENG Jian-Ping , LI Yuan-Jing , LAI Yong-Fang , YUE Qian , LI Jin , JIA Huai-Mao . A discussion about cosmic ray mass test method of MRPC. Chinese Physics C, 2006, 30(7): 655-659.
[4]	LIU Qian , ZHANG Jia-Wen , CHEN Jin , LI Ru-Bai , ZHAO Jian-Bing , HAN Ji-Feng , XIE Yu-Guang , YAO Ning , QI Na-Ding . Cosmic Ray Test Station for BESⅢ RPC. Chinese Physics C, 2006, 30(4): 327-330.
[5]	YUE Qian , LI Yuan-Jing , CHENG Jian-Ping , WANG Yi , LI Jin , LAI Yong-Fang , LI Qing-Hua , TANG Le . Cosmic-Ray Test and Temperature Effects of MRPC. Chinese Physics C, 2004, 28(11): 1180-1183.
[6]	LIU Zhen-An . Z⁰ Data Analysis in L3 Cosmic-Ray Experiment. Chinese Physics C, 2003, 27(5): 395-398.
[7]	JIA Huan-Yu , WANG Shun-Jin . Study of the Time Variation of 10TeV Cosmic Ray. Chinese Physics C, 2001, 25(4): 277-282.
[8]	XUE Liang , DAI ZhiQiang , LI Jinyu , ZHANG Xueyao , FENG CunFeng , FU Yu , ZHANG NaiJian , REN JingRu , LU SuiLing . Phenomenon of Alignment in Cosmic Ray High Energy Family Events. Chinese Physics C, 2000, 24(11): 979-984.
[9]	Liang Hualou , Xie Wei , Ren Jingru , Wang Taijie , Dai Guiliang . Distinguishing Primary Cosmic-Ray Composition with Artificial Neural Networks. Chinese Physics C, 1997, 21(3): 205-210.
[10]	Xu Chunxian , Dai Hongyue . A Statistic Model for Galactic Cosmic Rays. Chinese Physics C, 1997, 21(6): 486-493.
[11]	Gu Jianhui , Yu Zhongqiang . Muon Sample Selection from Cosmic Ray Events for BES. Chinese Physics C, 1996, 20(1): 26-31.
[12]	ZHANG Li , ZHANG Ming , MU Jun , YU Chuan-Zan . Monte Carlo Simulation for the Propagation of Galactic Cosmic Ray Nuclei. Chinese Physics C, 1993, 17(7): 589-594.
[13]	ZHU Yong-Sheng , ZHANG Liang-Sheng , GAO Wen-Xiu , ZHANG Ying-Ping , ZHAO Ping-De , ZHANG Jia-Wen , LI Fang , CHEN Le-Jun , XU Zhi-Qing . THE COSMIC RAY DATA ANALYSIS OF μ-COUNTER ARRAY IN BES. Chinese Physics C, 1990, 14(2): 102-109.
[14]	MA Ji-Mao , MAO Hui-Shun , BAI Jing-Zhi , XIE Pei-Pei , YAN Jie , WANG Yao-Hui , LIU Rong-Guang , SONG Xiao-Fei , WU Zhen-Dong , FAN Qun . RESULTS OF COSMIC RAY TESTS WITH THE BES MAIN DRIBT CHAMBER. Chinese Physics C, 1989, 13(9): 781-788.
[15]	ZOU Bao-Tang , WANG Cheng-Rui , REN Jing-Ru . A COSMIC RAY SUPER HIGH ENERGY MULTIJET FAMILY EVENT. Chinese Physics C, 1986, 10(4): 393-399.
[16]	JIANG Yin-Lin , YUAN Yu-Kui , LI Yan-Guo , CHEN Duan-Bao , ZHENG Rong-Ting , SONG Jian-Ning . RESEARCH FOR THE POSSIBILITY ON DETECTING COSMIC RAY PARTICLES BY ACOUSTIC WAY. Chinese Physics C, 1986, 10(1): 9-14.
[17]	XU Chun-Xian . THE ANISOTROPY OF COSMIC RAY PARTICLES IN THE ENERGY RANGE 10¹¹—10¹⁹eV. Chinese Physics C, 1985, 9(4): 385-390.
[18]	WANG Dian-Rong , WANG Xian-Pei , LI Cheng-Ze , CHEN Yuan-Bai , LIN Jian-Feng , CHANG Chia-Chuan , ZHAO Jing-Wei , JIANG Ying-Yuan , XU Yu-Lin , TANG Su-Qiu , DAI Gui-Liang . THE MEASUREMENT OF THE COSMIC RAY MUON ZENITH ANGLE DISTRIBUTION WITH ON-LINE MICROCOMPUTER. Chinese Physics C, 1983, 7(2): 135-141.
[19]	Kuang Hao-huai , Hu Wen-jun , Zhou Yin-zao , Tan You-HENG , Shen Chang-quan , Jang Yin-lin , Zhu Qing-qi , Qin Ke-yu , Li Yan-guo , Wang Li-an . IDENTIFICATION OF THE HORIZONTAL COSIMC RAY PENETRATING PARTICLES. Chinese Physics C, 1980, 4(4): 413-416.
[20]	LUO LIAU-FU , LU TAN . HIGH SPIN MESONS AND UNEXPLAINED MULTIPHOTON PHENOMENA. Chinese Physics C, 1978, 2(6): 562-565.

Access

Get Citation

Zhao Shu-song and Peng Shou-li. COSMIC RAY'S DATA OF MEAN LIVES OF D MESONS AND ∑_c⁺ BARYON[J]. Chinese Physics C, 1980, 4(4): 531-535.

Zhao Shu-song and Peng Shou-li. COSMIC RAY'S DATA OF MEAN LIVES OF D MESONS AND ∑_c⁺ BARYON[J]. Chinese Physics C, 1980, 4(4): 531-535. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1979-06-14
Revised: 1900-01-01

Article Metric

Article Views(1615)
PDF Downloads(273)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

COSMIC RAY'S DATA OF MEAN LIVES OF D MESONS AND ∑_c⁺ BARYON

Received Date: 1979-06-14

Accepted Date: 1900-01-01

Available Online: 1980-08-05

Abstract: A sieve-comparison method is proposed according to the accelerator's data ofcharmed particles to identify the properties of the X-particles observed in high energycosmic ray interactions. The principles of the sieve-comparison method are as follows: 1. The cross section σ_{xx} of these X-particles produced in pair should be appro-ximately equal to the cross section σ_DD of D meson produced in pair. 2. The empirical selection rules of the decay in weak interaction from the experi-ments using accelerators should be suitable to these X-particles: charmed number|Δc|=1, strangeness ΔS=Δc=1, isospin |ΔI₃| =1→|ΔI|=1, (nonlepton). 3. The charge and the decay channel should be in coincidence with the empiricalselection rule, Q=I₃+(B+C)/2 for each X particle and it's transverse momentumshould be large (P_⊥=400-1000MeV/c). 4. For the same kind of the particles, their width-mass ratio (г/M) should beof the same order of magnitude. All the X particles observed so far in emulsion chambers have been analyzedaccording to this method, it is found that they are possibly D, D, Σ_c⁺, Λ_c⁺, E_cc⁺, (seetable I). Inversely, we may estimate the mean lives and masses of new charmed parti-cles observed in accelerator's experiments according to cosmic ray's data. The resultsare shown in table II.

HTML

Reference (1)

COSMIC RAY'S DATA OF MEAN LIVES OF D MESONS AND ∑_c⁺ BARYON

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

COSMIC RAY'S DATA OF MEAN LIVES OF D MESONS AND ∑_c⁺ BARYON

HTML

目录