Observation of the doubly charmed baryon decay $$ {\varXi}_{cc}^{++}\to {\varXi}_c^{\prime +}{\pi}^{+}

• Published in: The journal of high energy physics Vol. 2022; no. 5
• Main Authors: Aaij, R., Abdelmotteleb, A. S. W., Abellán Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Agapopoulou, C., Aidala, C. A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., Amey, J. L., Amhis, Y., An, L., Anderlini, L., Andersson, M., Andreianov, A., Andreotti, M., Ao, D., Archilli, F., Artamonov, A., Artuso, M., Arzymatov, K., Aslanides, E., Atzeni, M., Audurier, B., Bachmann, S., Bachmayer, M., Back, J. J., Baladron Rodriguez, P., Balagura, V., Baldini, W., Baptista de Souza Leite, J., Barbetti, M., Barlow, R. J., Barsuk, S., Barter, W., Bartolini, M., Baryshnikov, F., Basels, J. M., Bassi, G., Batsukh, B., Battig, A., Bay, A., Beck, A., Becker, M., Bedeschi, F., Bediaga, I., Beiter, A., Belavin, V., Belin, S., Bellee, V., Belous, K., Belov, I., Belyaev, I., Bencivenni, G., Ben-Haim, E., Berezhnoy, A., Bernet, R., Berninghoff, D., Bernstein, H. C., Bertella, C., Bertolin, A., Betancourt, C., Betti, F., Bezshyiko, Ia, Bhasin, S., Bhom, J., Bian, L., Bieker, M. S., Biesuz, N. V., Bifani, S., Billoir, P., Biolchini, A., Birch, M., Bishop, F. C. R., Bitadze, A., Bizzeti, A., Bjørn, M., Blago, M. P., Blake, T., Blanc, F., Blusk, S., Bobulska, D., Boelhauve, J. A., Boente Garcia, O., Boettcher, T., Boldyrev, A., Bondar, A., Bondar, N.
• Format: Journal Article
• Language: English
• Published: Springer 06-05-2022
• Subjects: High Energy Physics - Experiment; Physics; baryon: (2charm); error: statistical; Flavour Physics; experimental results; Xi/cc: hadronic decay; charmed baryon: decay; charge: 2; branching ratio: ratio: measured; Hadron-Hadron Scattering; CERN LHC Coll; LHC-B; charm: 2; photon; Xi/c+: hadronic decay; Xi/c+ > > p K- pi; Proton-Proton Scattering; Charm Physics; p p: colliding beams; p p: scattering; charmed baryon > > Xi/c+ pi; 13000 GeV-cms; Xi/cc: branching ratio
• ISSN: 1029-8479; 1126-6708; 1029-8479
• DOI: 10.1007/JHEP05(2022)038

A
bstract
The
$$ {\varXi}_{cc}^{++}\to {\varXi}_c^{\prime +}{\pi}^{+} $$
Ξ
cc
+
+
→
Ξ
c
′
+
π
+
decay is observed using proton-proton collisions collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5
.
4 fb
−
1. The
$$ {\varXi}_{cc}^{++}\to {\varXi}_c^{\prime +}{\pi}^{+} $$
Ξ
cc
+
+
→
Ξ
c
′
+
π
+
decay is reconstructed partially, where the photon from the
$$ {\varXi}_c^{\prime +}\to {\varXi}_c^{+}\gamma $$
Ξ
c
′
+
→
Ξ
c
+
γ
decay is not reconstructed and the
pK
−
π
+
final state of the
$$ {\varXi}_c^{+} $$
Ξ
c
+
baryon is employed. The
$$ {\varXi}_{cc}^{++}\to {\varXi}_c^{\prime +}{\pi}^{+} $$
Ξ
cc
+
+
→
Ξ
c
′
+
π
+
branching fraction relative to that of the
$$ {\varXi}_{cc}^{++}\to {\varXi}_c^{+}{\pi}^{+} $$
Ξ
cc
+
+
→
Ξ
c
+
π
+
decay is measured to be 1
.
41
±
0
.
17
±
0
.
10, where the first uncertainty is statistical and the second systematic.