More Like this

1. Measurement of $${{\mathrm{D}}^0}$$ D 0 , $${{\mathrm{D}}^+}$$ D + , $${{\mathrm{D}}^{*+}}$$ D ∗ + and $${{\mathrm{D}}^+_{\mathrm{s}}}$$ D s + production in pp collisions at $${\sqrt{{\textit{s}}}~=~5.02~{\text {TeV}}}$$ s = 5.02 TeV with ALICE

   https://doi.org/10.1140/epjc/s10052-019-6873-6  

   Acharya, S. ; Adamová, D. ; Adhya, S. P. ; Adler, A. ; Adolfsson, J. ; Aggarwal, M. M. ; Aglieri Rinella, G. ; Agnello, M. ; Ahammed, Z. ; Ahmad, S. ; et al ( May 2019 , The European Physical Journal C)
2. Angular analysis of $$ {B}^0\to {D}^{\ast -}{D}_s^{\ast +} $$ with $$ {D}_s^{\ast +}\to {D}_s^{+}\gamma $$ decays

   https://doi.org/10.1007/JHEP06(2021)177  

   Aaij, R. ; Abellán Beteta, C. ; Ackernley, T. ; Adeva, B. ; Adinolfi, M. ; Afsharnia, H. ; Aidala, C. A. ; Aiola, S. ; Ajaltouni, Z. ; Akar, S. ; et al ( June 2021 , Journal of High Energy Physics)

   A bstract The first full angular analysis of the $$ {B}^0\to {D}^{\ast -}{D}_s^{\ast +} $$ B 0 → D ∗ − D s ∗ + decay is performed using 6 fb − 1 of pp collision data collected with the LHCb experiment at a centre-of-mass energy of 13 TeV. The $$ {D}_s^{\ast +}\to {D}_s^{+}\gamma $$ D s ∗ + → D s + γ and D * − → $$ {\overline{D}}^0{\pi}^{-} $$ D ¯ 0 π − vector meson decays are used with the subsequent $$ {D}_s^{+} $$ D s + → K + K − π + and $$ {\overline{D}}^0 $$ D ¯ 0 → K + π − decays. All helicity amplitudes and phases are measured, and the longitudinal polarisation fraction is determined to be f L = 0 . 578 ± 0 . 010 ± 0 . 011 with world-best precision, where the first uncertainty is statistical and the second is systematic. The pattern of helicity amplitude magnitudes is found to align with expectations from quark-helicity conservation in B decays. The ratio of branching fractions [ℬ( $$ {B}^0\to {D}^{\ast -}{D}_s^{\ast +} $$ B 0 → D ∗ − D s ∗ + ) × ℬ( $$ {D}_s^{\ast +}\to {D}_s^{+}\gamma $$ D s ∗ + → D s + γ )] / ℬ( B 0 → D * − $$ {D}_s^{+} $$ D s + ) is measured to be 2 . 045 ± 0 . 022 ± 0 . 071 with world-best precision. In addition, the first observation of the Cabibbo-suppressed B s → D * − $$ {D}_s^{+} $$ D s + decay is made with a significance of seven standard deviations. The branching fraction ratio ℬ( B s → D * − $$ {D}_s^{+} $$ D s + ) / ℬ( B 0 → D * − $$ {D}_s^{+} $$ D s + ) is measured to be 0 . 049 ± 0 . 006 ± 0 . 003 ± 0 . 002, where the third uncertainty is due to limited knowledge of the ratio of fragmentation fractions. 

   more » « less
3. Geometric phase effects in the ultracold D + HD $ \rightarrow $ D + HD and D + HD $\leftrightarrow $ H + D 2 reactions

   https://doi.org/10.1088/1367-2630/aa4fd2  

   Kendrick, B K ; Hazra, Jisha ; Balakrishnan, N ( December 2016 , New Journal of Physics)
4. Dear D

   Whitney L. Duncan ( June 2022 , American anthropologist)

   In this piece, I explore both the intimacy and estrangement of ethnographic engagements, especially those that have unfolded during the pandemic, as ethnographic fieldwork and research have blurred even more than usual into accompaniment, friendship, advocacy, and mutual support. During this time, I have struggled with more traditional academic writing; for “D” and others, I have found myself unable to muster case studies or to extract quotations from interviews, conversations, and other exchanges to illustrate broader theoretical and empirical points. What emerges instead is a kind of letter to D, a fragmented reflection on her stories, struggles, and points of resistance, interwoven with my own experiences of the same periods of time and of the ways our relationship has evolved over the past few years. The piece considers how the pandemic has transformed ethnographic being-with, or convivencia: over the phone; via WhatsApp messages; through objects, foods, stories, and memories that we exchange in brief masked meetings . . . COVID precautions have flattened dimensionality in some senses but have also opened new space for forms of ethnographic accompaniment, intimacy, imagination, and advocacy. In this sense, the pandemic has illuminated the tendrilled connections between my interlocutors and me in unanticipated ways. Especially given that I now conduct research and advocacy in the region where I live, I explore and convey the seemingly intractable and violent nature of inequality that shapes our different life experiences and puts D, her family, and the other families with whom I work at elevated risk—for disease, for drowning, for violence, for economic calamity, for invisibility, for grief—all the time, pandemic or not. 

   more » « less
5. Observation of the $$ {B}_s^0 $$ → D*±D∓ decay

   https://doi.org/10.1007/JHEP03(2021)099  

   Aaij, R. ; Abellán Beteta, C. ; Ackernley, T. ; Adeva, B. ; Adinolfi, M. ; Afsharnia, H. ; Aidala, C. A. ; Aiola, S. ; Ajaltouni, Z. ; Akar, S. ; et al ( March 2021 , Journal of High Energy Physics)

   A bstract A search for the $$ {B}_{\mathrm{s}}^0 $$ B s 0 → D *± D ∓ decay is performed using proton-proton collision data at centre-of-mass energies of 7, 8 and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb − 1 . The decay is observed with a high significance and its branching fraction relative to the B 0 → D *± D ∓ decay is measured to be $$ \frac{\mathrm{\mathcal{B}}\left({B}_s^0\to {D}^{\ast \pm }{D}^{\mp}\right)}{\left({B}^0\to {D}^{\ast \pm }{D}^{\mp}\right)}=0.137\pm 0.017\pm 0.002\pm 0.006, $$ ℬ B s 0 → D ∗ ± D ∓ B 0 → D ∗ ± D ∓ = 0.137 ± 0.017 ± 0.002 ± 0.006 , where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the $$ {B}_{\mathrm{s}}^0 $$ B s 0 and B 0 hadronisation fractions. 

   more » « less