nucl-ex digest · Feb 24, 2022

Production of

P_{c}

(4312) state in electron-proton collisions

We study the cross sections for the electro-production of

P_{c} (4312)

particle, a recently discovered pentaquark state, in electron-proton collisions assuming possible quantum numbers to be

J^{P} = \frac{1}{2}^{\pm}, \frac{3}{2}^{\pm}

s

is set to the energy of the future Electron Ion Collider at Brookhaven National Laboratory, in order to asses the possibility of the measurement in this facility. One can discriminate the spin of

P_{c} (4312)

by comparing the pseudorapidity distribution in two different polarization configurations for proton and electron beams. Furthermore, the parity of

P_{c} (4312)

can be discerned by analyzing the decay angle in the

P_{c} \to p + J / ψ

channel. As the multiplicity of

P_{c}

production in our calculation is large, the EIC can be considered as a future facility for precision measurement of heavy pentaquarks.

↳ hep-phnucl-exnucl-thPRD(2022)·8 citations

02*

Radiopurity studies of a rock sample from the Aut region

Swati Thakur🇮🇳 · A. Mazumdar🇮🇳 · Nishant Jangid🇮🇳 · V. Vatsa🇮🇳 · M.S. Pose🇮🇳 · S. Mallikarjunachary🇮🇳 · S. Pal🇨🇦 · V. Nanal🇮🇳 · R.G. Pillay🇮🇳 · P.K. Raina🇮🇳 · Pushpendra P. Singh🇮🇳 · S.K. Dhiman🇮🇳

Efforts are underway to set up an underground laboratory in India for rare event studies like double beta decay, dark matter, etc. For such experiments, mitigation of radiation background is of paramount importance and understanding ambient background at the site, originating from the rock, is one of the crucial factors. With this motivation, the radiopurity studies of a rock sample from the potential laboratory site in the Aut tunnel of Himachal Pradesh (India) have been carried out using the TIFR low background experimental setup (TiLES). The concentration of $^{40}$ K in Aut rock is observed to be lower by a factor of ~1000 as compared to the samples from BWH (Bodi West Hill), Tamil Nadu (India), current designated site for India-based Neutrino Observatory. The natural radioactive trace impurity $^{232}$ Th is lower in the Aut rock, while $^{238}$ U is somewhat higher than the BWH rock. Overall, the ambient gamma ray background at Aut is expected to be lower than the BWH, while ambient neutron background is expected to be similar. Further, to assess the neutron-induced long lived activity, fast neutron activation studies have been carried out on the both Aut and BWH rock samples at the Pelletron Linac Facility, Mumbai.

↳ physics.ins-detnucl-exNucl.Instrum.Meth.A(2022)·2 citations

Production of Pc​(4312) state in electron-proton collisions

Radiopurity studies of a rock sample from the Aut region

Production of $P_{c}$ (4312) state in electron-proton collisions