Taking a closer look at LHC - LHC New Particles

LHC - New particles

Taking a closer look at LHC

In addition to the Higgs Boson, dozens of new hadrons have been discovered with collision data at the LHC during Run 1 and Run 2. Most of them have been found in the LHCb experiment.

The table below shows the discoveries announced from April 2012 to June 2026, and is taken from the Patrick Koppenburg-Website

Experiment	Particle	Mass (GeV)	Date
ATLAS	Higgs Boson	126.0 $\pm 0.6$	31 Jul 2012
CMS	Higgs Boson	125.3 $\pm 0.7$	31 Jul 2012

N	Experiment	Name	Mass (MeV)	Quarks	Date
1	ATLAS	χb(3P)	10530±10	b¯b	21 Dec 2011
2	CMS	Ξb(5945)0	5945.0±3.0	bsu	26 Apr 2012
3	LHCb	Λb(5920)0	5919.8±0.7	bud	15 May 2012
4	LHCb	Λb(5912)0	5912.0±0.7	bud	15 May 2012
5-6.	LHCb	D∗J(3000)+,0	3008±4	c¯q	17 Jul 2013
7	LHCb	DJ(3000)0	2972±9	c¯u	17 Jul 2013
8	LHCb	D∗J(2760)+	2772±4	c¯d	17 Jul 2013
9	LHCb	DJ(2740)0	2737±12	c¯u	17 Jul 2013
10	LHCb	DJ(2580)0	2580±6	c¯u	17 Jul 2013
11	CMS	χc1(4140)	4146.5±3.0	c¯c(s¯s)	26 Sep 2013
12	ATLAS	Bc(2S)+	6842±6	¯bc	03 Jul 2014
13	LHCb	D∗s1(2860)+	2859±27	c¯s	28 Jul 2014
14	LHCb	Ξb(5955)−	5955.3±0.5	bsd	18 Nov 2014
15	LHCb	Ξ′b(5935)−	5935.0±0.5	bsd	18 Nov 2014
16-17.	LHCb	BJ(5970)+,0	5969±6	¯bq	09 Feb 2015
18-19.	LHCb	BJ(5840)+,0	5863±9	¯bq	09 Feb 2015
20	LHCb	Pc¯c(4450)+	4449.8±3.0	c¯cuud	13 Jul 2015
21	LHCb	Pc¯c(4380)+	4380±30	c¯cuud	13 Jul 2015
22	LHCb	χc0(4700)	4694+16−5	c¯c(s¯s)	25 Jun 2016
23	LHCb	χc0(4500)	4474±4	c¯c(s¯s)	25 Jun 2016
24	LHCb	χc1(4274)	4286+8−9	c¯c(s¯s)	25 Jun 2016
25	LHCb	D∗3(2760)0	2776±8	c¯u	03 Aug 2016
26	LHCb	Λc(2860)+	2856+2−6	cud	26 Jan 2017
27	LHCb	Ωc(3119)0	3119.1+1.0−1.1	css	14 Mar 2017
28	LHCb	Ωc(3090)0	3090.2+0.7−0.8	css	14 Mar 2017
29	LHCb	Ωc(3066)0	3065.6+0.4−0.6	css	14 Mar 2017
30	LHCb	Ωc(3050)0	3050.2+0.3−0.5	css	14 Mar 2017
31	LHCb	Ωc(3000)0	3000.4+0.4−0.5	css	14 Mar 2017
32	LHCb	Ξ++cc	3621.4±0.8	ccu	06 Jul 2017
33	LHCb	Ξb(6227)−	6226.9±2.0	bsd	23 May 2018
34	CMS	χb2(3P)	10524.0±0.6	b¯b	28 May 2018
-	CMS	χb1(3P)	10513.4±0.4	b¯b	28 May 2018
35	LHCb	Σb(6097)−	6095.8±1.8	bdd	20 Sep 2018
36	LHCb	Σb(6097)+	6098.0±1.8	buu	20 Sep 2018
37	CMS	B∗c(2S)+	Undetermined	¯bc	01 Feb 2019
-	CMS	Bc(2S)+	6871.0±1.6	¯bc	01 Feb 2019
38	LHCb	ψ(3842)	3842.70±0.20	c¯c	28 Mar 2019
39	LHCb	Pc¯c(4457)+	4457+4−2	c¯cuud	08 Apr 2019
-	LHCb	Pc¯c(4440)+	4440+4−5	c¯cuud	08 Apr 2019
40	LHCb	Pc¯c(4312)+	4312+7−1	c¯cuud	08 Apr 2019
41	LHCb	Λb(6152)0	6152.5±0.4	bud	31 Jul 2019
42	LHCb	Λb(6146)0	6146.2±0.4	bud	31 Jul 2019
43	LHCb	Ωb(6350)−	6349.9±0.6	bss	03 Jan 2020
44	LHCb	Ωb(6340)−	6339.7±0.6	bss	03 Jan 2020
45	LHCb	Λb(6070)0	6072.3±3.0	bud	12 Feb 2020
46	LHCb	Ξc(2965)0	2964.9±0.4	csd	30 Mar 2020
47	LHCb	Ξc(2939)0	2938.55±0.30	csd	30 Mar 2020
48	LHCb	Ξc(2923)0	2923.04±0.35	csd	30 Mar 2020
49	LHCb	Tc¯cc¯c(6900)	6899±12	c¯cc¯c	30 Jun 2020
50	LHCb	T∗cs1(2900)0	2904±5	c¯ds¯u	31 Aug 2020
51	LHCb	T∗cs0(2870)0	2866±7	c¯ds¯u	31 Aug 2020
52	LHCb	Ξb(6227)0	6227.1+1.5−1.6	bsu	27 Oct 2020
53	LHCb	B∗s(6114)0	6114±6	¯bs	29 Oct 2020
54	LHCb	B∗s(6063)0	6063.5±1.4	¯bs	29 Oct 2020
55	LHCb	Ds0(2590)+	2591±9	c¯s	18 Nov 2020
56	CMS	Ξb(6100)−	6100.3±0.6	bsd	08 Feb 2021
57	LHCb	χc1(4685)	4684+15−17	c¯c(s¯s)	02 Mar 2021
58	LHCb	X(4630)	4630+20−110	c¯c(s¯s)	02 Mar 2021
59	LHCb	Tc¯c¯s1(4220)+	4220+50−40	c¯cu¯s	02 Mar 2021
60	LHCb	Tc¯c¯s1(4000)+	4003+7−15	c¯cu¯s	02 Mar 2021
61	LHCb	Tcc(3875)+	3874.83±0.11	cc¯u¯d	03 Sep 2021
62	LHCb	Ξb(6333)0	6332.70±0.30	bsu	12 Oct 2021
63	LHCb	Ξb(6327)0	6327.30±0.30	bsu	12 Oct 2021
64	LHCb	Pc¯cs(4338)0	4338.2+0.7−0.4	c¯csud	19 Oct 2022
65	LHCb	X(3960)	3956±13	c¯c(s¯s)	25 Oct 2022
66	LHCb	T∗c¯s0(2900)0	2892±21	c¯s¯ud	06 Dec 2022
67	LHCb	T∗c¯s0(2900)++	2921±26	c¯su¯d	06 Dec 2022
68	LHCb	Tc¯c¯s1(4000)0	3991+15−20	c¯cd¯s	12 Jan 2023
69	LHCb	Ωc(3185)0	3185+8−2	css	10 Feb 2023
70	LHCb	Ωc(3327)0	3327.1+1.3−1.8	css	10 Feb 2023
71	CMS	Tc¯cc¯c(6600)	6552±16	c¯cc¯c	12 Jun 2023
72	LHCb	Ξb(6095)0	6095.4±0.5	bsu	25 Jul 2023
73	LHCb	Ξb(6087)0	6087.2±0.5	bsu	25 Jul 2023
74	LHCb	hc(4000)	4000+33−26	c¯c	06 Jun 2024
75	LHCb	χc1(4010)	4013+6−5	c¯c(q¯q)	06 Jun 2024
76	LHCb	hc(4300)	4307+7−8	c¯c	06 Jun 2024
77	LHCb	Ξc(2923)+	2922.8+0.3−0.5	csu	26 Feb 2025
78	LHCb	Bc(6700)+	6705+6−3	¯bc	03 Jun 2025
-	LHCb	Bc(6750)+	6752+10−3	¯bc	03 Jun 2025
79	CMS	Tc¯cc¯c(7100)	7173±16	c¯cc¯c	02 Feb 2026
80	LHCb	Ξ+cc	3620.0+2.1−1.6	ccd	01 Apr 2026
81	LHCb	Ds1(2933)+	2933+7−6	c¯s	23 Apr 2026
82	ATLAS	B∗+c	6339.0+1.7−2.0	¯bc	15 May 2026

So far 82 hadrons have been discovered at the LHC, of which 72 by LHCb Experiment

AUTHORS

Xabier Cid Vidal, PhD in experimental Particle Physics for Santiago University (USC). Research Fellow in experimental Particle Physics at CERN from January 2013 to Decembre 2015. He was until 2022 linked to the Department of Particle Physics of the USC as a "Juan de La Cierva", "Ramon y Cajal" fellow (Spanish Postdoctoral Senior Grants), and Associate Professor. He is currently a Senior Lecturer at the Galician Institute of High Energy Physics (IGFAE) and leads the IGFAE team working on the CMS experiment at CERN.(ORCID).

Ramon Cid Manzano, until his retirement in 2020 was secondary school Physics Teacher at IES de SAR (Santiago - Spain), and part-time Lecturer (Profesor Asociado) in Faculty of Education at the University of Santiago (Spain). He has a Degree in Physics and a Degree in Chemistry, and he is PhD for Santiago University (USC) (ORCID).

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