CERN Accelerating science

ALICE Papers

新增:
2021-05-11
10:41
Charged-particle multiplicity fluctuations in Pb–Pb collisions at $\sqrt{s_{\rm NN}$ = 2.76 TeV / ALICE Collaboration, CERN /ALICE
Measurements of event-by-event fluctuations of charged-particle multiplicities in Pb–Pb collisions at $\sqrt{s_{\rm NN}$ = 2.76 TeV using the ALICE detector at the CERN Large Hadron Collider (LHC) are presented in the pseudorapidity range |$\eta$| < 0.8 and transverse momentum 0.2 < $p_{\rm T}$ < 2.0 GeV/$c$. The amplitude of the fluctuations is expressed in terms of the variance normalized by the mean of the multiplicity distribution. [...]
CERN-EP-2021-089.- Geneva : CERN, 2021 Draft (restricted): PDF;

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2021-05-10
12:45
Charm-quark fragmentation fractions and production cross section at 4 midrapidity in pp collisions at the LHC / ALICE Collaboration, CERN
Recent $p_{\rm T}$-integrated cross section measurements of the ground-state charm mesons and baryons, $\mathrm{D^0}$, $\mathrm{D^+}$, $\mathrm{D_s^+}$, $\Lambda_\mathrm{c}^+$, and $\Xi_\mathrm{c}^0$, are used to evaluate the charm fragmentation fractions and production cross section per unit of rapidity at midrapidity ($|y|<0.5$), in pp collisions at $\sqrt{s} = 5.02$ TeV at the LHC. The latter is $\mathrm{d}\sigma^{\mathrm{c\overline{c}}}/\mathrm{d} y|_{|y| < 0.5}=1165\pm 44(\mathrm{stat})^{+134}_{-101}(\mathrm{syst}) \ \mu\mathrm{b}$. [...]
CERN-EP-2021-088.- Geneva : CERN, 2021 - 12. Draft (restricted): PDF;

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2021-05-10
09:55
Measurement of K$^{*}$(892)$^{\pm}$ production in inelastic pp collisions at the LHC / ALICE Collaboration, CERN
The first results on K$^{*}$(892)$^{\pm}$ resonance production in inelastic pp collisions at LHC energies of $\sqrt{s}$ = 5.02, 8, and 13 TeV are presented. The K$^{*}$(892)$^{\pm}$ has been reconstructed via its hadronic decay channel K$^{*}$(892)$^{\pm} \rightarrow K^{0}_{S} + \pi^{\pm}$ with the ALICE detector. [...]
CERN-EP-2021-086.- Geneva : CERN, 2021 Draft (restricted): PDF;

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2021-05-07
16:45
Measurement of the cross sections of $\rm \Xi_{c}^{0}$ and $\rm \Xi_{c}^{+}$ baryons and of the branching-fraction ratio BR($\rm \Xi_{c}^{0} \rightarrow \Xi^{-}e^+ \nu$)/BR($\rm \Xi_{c}^{0} \rightarrow \Xi^{-} \pi^{+}$) in pp collisions at $\sqrt{s}$ = 13 TeV / Acharya, Shreyasi (Calcutta, VECC) ; Adamova, Dagmar (Rez, Nucl. Phys. Inst.) ; Adler, Alexander (Goethe U., Frankfurt, Inst. Inform.) ; Adolfsson, Jonatan (Lund U.) ; Aglieri Rinella, Gianluca (CERN) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) et al.
The $p_{\rm T}$-differential cross sections of prompt charm-strange baryons $\rm \Xi_{c}^{0}$ and $\rm \Xi_{c}^{+}$ were measured at midrapidity (|y| < 0.5) in proton–proton (pp) collisions at a centre-of-mass energy $\sqrt{s}$ = 13 TeV with the ALICE detector at the LHC. The $\rm \Xi_{c}^{0}$ baryon was reconstructed via both the semileptonic decay ($\rm \Xi_{c}^{0} \rightarrow \Xi^{-}e^+ \nu$) and the hadronic decay ($\rm \Xi_{c}^{0} \rightarrow \Xi^{-} \pi^{+}$) channels. [...]
arXiv:2105.05187; CERN-EP-2021-084.- Geneva : CERN, 2021 - 17 p. Draft (restricted): PDF; Fulltext: PDF;

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2021-05-07
10:42
Investigating the role of strangeness in baryon-antibaryon annihilation at the LHC / Acharya, Shreyasi (Calcutta, VECC) ; Adamova, Dagmar (Rez, Nucl. Phys. Inst.) ; Adler, Alexander (Goethe U., Frankfurt, Inst. Inform.) ; Adolfsson, Jonatan (Lund U.) ; Aglieri Rinella, Gianluca (CERN) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) et al.
Annihilation dynamics plays a fundamental role in the baryon-antibaryon interaction ($\rm{B}\mbox{-}\rm{\overline{B}}$) at low-energy and its strength and range are crucial in the assessment of possible baryon bound states. Experimental data on annihilation cross sections are available for the $\rm{p}\mbox{-}\rm{\overline{p}}$ system but not in the low relative momentum region. [...]
arXiv:2105.05190; CERN-EP-2021-083.- Geneva : CERN, 2021 - 16 p. Draft (restricted): PDF; Fulltext: PDF;

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2021-05-06
22:01
First measurements of $N$-subjettiness in central Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV / Acharya, Shreyasi (Calcutta, VECC) ; Adamova, Dagmar (Rez, Nucl. Phys. Inst.) ; Adler, Alexander (Goethe U., Frankfurt, Inst. Inform.) ; Adolfsson, Jonatan (Lund U.) ; Aglieri Rinella, Gianluca (CERN) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) et al.
The ALICE Collaboration reports the first fully-corrected measurements of the $N$-subjettiness observable for track-based jets in heavy-ion collisions. This study is performed using data recorded in pp and Pb$-$Pb collisions at centre-of-mass energies of $\sqrt{s} = 7$ TeV and $\sqrt{s_{\rm NN}} = 2.76$ TeV, respectively. [...]
arXiv:2105.04936; CERN-EP-2021-082.- Geneva : CERN, 2021 - 28 p. Draft (restricted): PDF; Fulltext: PDF;

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2021-05-06
17:43
Experimental evidence for an attractive $p-\phi$ interaction / ALICE Collaboration, CERN
This Letter presents the first experimental evidence of the attractive strong interaction between a proton and a $\phi$ meson. The result is obtained from two-particle correlations of combined $p-\phi \oplus \overline{p}-\phi$ pairs measured in high-multiplicity p-p collisions at $\sqrt{s}~=~13$ TeV by the ALICE collaboration. [...]
CERN-EP-2021-081.- Geneva : CERN, 2021 Draft (restricted): PDF;

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2021-05-06
17:21
Kaon-proton strong interaction at low relative momentum via femtoscopy in Pb-Pb collisions at the LHC / ALICE Collaboration, CERN
In quantum scattering processes between two particles, aspects characterizing the strong and Coulomb forces can be observed in kinematic distributions of the particle pairs. The sensitivity to the interaction potential reaches a maximum at low relative momentum and vanishing distance between the two particles. [...]
CERN-EP-2021-080.- Geneva : CERN, 2021 Draft (restricted): PDF;

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2021-05-06
14:25
Measurement of the production cross section of prompt $\Xi^0_{\rm c}$ baryons at midrapidity in pp collisions at $\sqrt{s}$ = 5.02 TeV / ALICE Collaboration, CERN
The transverse momentum ($p_{\rm T}$) differential cross section of the charm-strange baryon $\Xi^0_{\rm c}$ is measured at midrapidity ($|y|<$ 0.5) via its semileptonic decay into ${\rm e^{+}}\Xi^{-}\nu_{\rm e}$ in pp collisions at $\sqrt{s}$ = 5.02 TeV with the ALICE detector at the LHC. The ratio of the \pt-differential $\Xi^0_{\rm c}$-baryon and ${\rm D^0}$-meson production cross sections is also reported. [...]
CERN-EP-2021-079.- Geneva : CERN, 2021 - 20. Draft (restricted): PDF;

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2021-05-03
13:49
Inclusive, prompt and non-prompt $\rm J/\psi$ production at midrapidity in p$-$Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV / Acharya, Shreyasi (Calcutta, VECC) ; Adamova, Dagmar (Rez, Nucl. Phys. Inst.) ; Adler, Alexander (Goethe U., Frankfurt, Inst. Inform.) ; Adolfsson, Jonatan (Lund U.) ; Aglieri Rinella, Gianluca (CERN) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) et al.
A measurement of inclusive, prompt, and non-prompt ${\rm J}/\psi$ production in p$-$Pb collisions at a nucleon--nucleon centre-of-mass energy $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV is presented. The ${\rm J}/\psi$ mesons are reconstructed in the dielectron decay channel at midrapidity down to a transverse momentum $p_{\rm T} = 0$. [...]
arXiv:2105.04957; CERN-EP-2021-077.- Geneva : CERN, 2021 - 30 p. Draft (restricted): PDF; Fulltext: PDF;

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