First results from DAMA/LIBRA and the combined results with DAMA/NaI

被引：906

作者：

Bernabei, R. ^{[1
,2
]}

Belli, P. ^{[2
]}

Cappella, F. ^{[3
,4
]}

Cerulli, R. ^{[5
]}

Dai, C. J. ^{[6
]}

d'Angelo, A. ^{[3
,4
]}

He, H. L. ^{[6
]}

Incicchitti, A. ^{[4
]}

Kuang, H. H. ^{[6
]}

Ma, J. M. ^{[6
]}

Montecchia, F. ^{[1
,2
]}

Nozzoli, F. ^{[1
,2
]}

Prosperi, D. ^{[3
,4
]}

Sheng, X. D. ^{[6
]}

Ye, Z. P. ^{[6
,7
]}

机构：

[1] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[2] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[4] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

[5] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Coppito, Italy

[6] Chinese Acad, IHEP, Beijing 100039, Peoples R China

[7] Univ Jing Gangshan, Jiangxi, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL C | 2008年 / 56卷 / 03期

关键词：

D O I：

10.1140/epjc/s10052-008-0662-y

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The highly radiopure similar or equal to 250 kg NaI(Tl) DAMA/LIBRA set-up is running at the Gran Sasso National Laboratory of the INFN. In this paper the first result obtained by exploiting the model independent annual modulation signature for Dark Matter (DM) particles is presented. It refers to an exposure of 0.53 tonxyr. The collected DAMA/LIBRA data satisfy all the many peculiarities of the DM annual modulation signature. Neither systematic effects nor side reactions able to account for the observed modulation amplitude and to contemporaneously satisfy all the several requirements of this DM signature are available. Considering the former DAMA/NaI and the present DAMA/LIBRA data all together (total exposure 0.82 tonxyr), the presence of Dark Matter particles in the galactic halo is supported, on the basis of the DM annual modulation signature, at 8.2 sigma C.L.; in particular, in the energy interval (2-6) keV, the modulation amplitude is (0.0131 +/- 0.0016) cpd/kg/keV and the phase and the period are well compatible with June 2(nd) and one year, respectively.

引用

页码：333 / 355

页数：23

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